I'm interested in this also. I'm not to that point yet but I've been thinking about it.

I will bee going with Vintage Air and patching the firewall. Figured once the AC unit was in place ( mocked up ) I would find the right spot.

 

I'm considering an extension of the ECU Powertrain Control Module wires such that the box and it's OBD II port can be installed in the glove box of my 70 El Camino. This gets it out of the high heat and potential moisture exposure under the hood. I might also have room under one of the passenger compartment seats for the PCM to preserve my glove box space.

It also cleans up the overall look of things under the hood and leaves more room to run the tubing for the airbox assembly of my LM7 engine.

Rick

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I'm considering an extension of the ECU Powertrain Control Module wires such that the box and it's OBD II port can be installed in the glove box of my 70 El Camino. This gets it out of the high heat and potential moisture exposure under the hood. I might also have room under one of the passenger compartment seats for the PCM to preserve my glove box space.

On my 71 Chevelle, I put the e40 ECM inside the cabin, behind the passenger kickpanel. I used a A/C Panel, but I'm using aftermarket AC (Classic Auto Air). I ran the harness through the original blower motor location.

I think you should have enough space on top of the glovebox to mount the ECM (my harness wasn't long enough).

 

I have mine in my 67 under the hood. They came that way factory on the trucks' and SUV's they came in, so that was good enough for me. I have mine to the right of the master cylinder in the area under the driver fender.I fabbed a strap to secure it, as the bulky bracket was hard to fit. When the fender is on, and the well is in, it is hidden. You have to remove the well to access it, but I don't plan on having to mess with it much, so I can live with the access limitations to keep the ugly thing out of sight...

 

I have mine in my 67 under the hood... to the right of the master cylinder in the area under the driver fender..., so I can live with the access limitations to keep the ugly thing out of sight...

X2

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Philip spent a lot of time on this with his 72 wagon. Check his build thread in the wagon section. He built a custom console and mounted it towards the front. got it out from under the hood, didn't have to extend the wires.

 

I was thinking about doing an LS. Would it be possible to locate items in the large space ( on a 70 ) to the right of the battery. " inside of fender well " Or 2nd. choice, left side front fender well.
Both sides have a lot of space for mounting " THINGS ". Just a thought.
Bob

 

On my 70-1' I have the PCM inside the driver side fender behind the head lights . I reused a truck harness and the way it lays out makes the DR fender the logical placement.

 

The worry for me would be exposure to water splashing in those areas. Of course, the plan is that my car will never intentionally see much rain but I can't guarantee that.

Rick

 

On my 70-1' I have the PCM inside the driver side fender behind the head lights . I reused a truck harness and the way it lays out makes the DR fender the logical placement.

The factory ECU is completely sealed. On the trucks, it's mounted right on the core support next to the fan. I guarantee it gets wet any time it rains. I have yet to have a single electrical issue on my truck at 220,000+ miles.

I do like the idea of tucking it up under the fender as much out of sight as possible. Up front on the left behind the headlight was what I considered when I was thinking of the LS swap idea myself.

 

http://www.chevelles.com/forums/showthread.php?t=659514

We spent quite a bit of time extending the heater box to tuck it inside. See above thread, post #79.

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Skylarkuil, you pics on fokti are inaccessible. It's prompting for username and password.

 

Try it now. I think I cleared the password requirement.

 

yeppers, good now. Did you do that checkered pattern on the firewall?

 

Yes. We work Mecum auction in Dallas every year - driving cars across the stage. One of the cars had a similar patterned firewall and I liked the look.

 

I would love to see some more options of what people did with theirs. Especially the ones under dash. I have the vintage air box in there and have a PSI harness that is long enough to reach quite a long ways. Have it coming through at the beginning of the trans tunnel on the passenger side. Also was thinking of maybe putting it under a seat.

 

I have the PSI Conversions made harness and they make them long enough for the purpose of installing them inside, which is why I used them. I was able to drill the 2" hole in the firewall just above the passenger side head and feed the harness through from the inside. There was just enough room behind the heater box to route the bulk of the wiring, but I'm still not sure where to mount the computer. My situation is a bit different in that a previous owner made a custom dash insert and I plan to eventually replace it. If I find a happy home for it under the dash, I'm worried about having to fight with it when that time comes. I'm using the factory console and shiftworks shifter, no room there. Might end up using the glove box space I guess. Thanks for all the ideas and pictures, it all helps!

 

i mounted mine on top of glove box , i was trying to keep engine bay from looking like a wiring night mare and clean ,, you need as many options for mounting air intake so you you want to save the front areas ,WHERE HORNS ARE , or move battery to the back and put it there , because of iats get high and start pulling timing and lose 70 horsepower ,, also mounting relays up front ,plan ahead ,you will wish u did ... JT

 

Looks like there is enough room above the little glove box that comes with the vintage air system. I still haven't figure out where to put the fuse block and relays.

 

I mounted an ECM on the inner fender up under the back of the passenger side fender. The wiring was run down low so it was not "in your face" and the ECM is only visible looking across the firewall from the back of the hood on the driver side. I cut a panel out of the inner fender and made it removable with the tire removed.

Take an ECM; put it on the back of the inner fender and push it up and forward toward the top of the fender. You will be surprised how much room there is. Should work on either side. Passenger side is easy without factory A/C.

That location on a 65 is in a cool air flow from above the passenger headlight and protected from most water. The ECM and connectors if they are complete and in good condition have seals to keep water out. No problems in over six years.

I used a fuse box like this: https://www.ebay.com/itm/1995-96-97...-Hood-Fuse-Box-used/263204573547?hash=item3d4837116b:g:HVUAAOSwcg9ZuSGQ&vxp=mtr

Removed all extraneous items, rewired to suite my purpose and mounted on firewall near passenger hood hinge. Accessible, painted to match the firewall so it doesn't stand out. This provided all the necessary fuses and relays to handle all high loads that the original wiring harness was not designed to handle....fans, A/C, radio, ECM, EFI, high amp alternator. So, two wiring system, original and new.

 

Under a custom built console on my 72 wagon. The removable front cover over the PCM is going to be modified to have a recessed tray in the center.

 

Amazing how those seats, console, and gauges modernized that interior. Almost looks like a new car. Very tasteful and well done.:thumbsup:

 

I mounted my LS1 PCM on the interior side of the firewall with a billet bracket that I found on a Jeep site. I think Dirty Dingo makes something similar now.

I used self tapping bolts that I painted black & screwed through the upper cowl area so I wouldn't disturb my smoothed firewall. Once the cowl grille is in place, the bolts are invisible. I glued some dense rubber padding to the mount so the PCM wouldn't rattle & even used rubber insulators between the mount & the firewall so it wouldn't rattle either.

I used a holesaw (approx 1.25" OD) on the firewall (before paint) to route all the wires from the under dash area in to the engine compartment. It was actually an exercise in patience to get all those connectors through the small hole with all the wires without snapping the plastic or fraying the wire insulation. I used a grommet from a car door harness that I found in pick a part to seal the firewall. Probably took me 3 hours to route all those wires through the hole. Plenty of cursing was involved.

 

I used my leftover heater delete panel from the vintage air kit and cut out and fabbed up a bracket for my ECU. Hopefully get that mounted under the dash above the glove box this weekend.

 

Speaking of ECU placement, when using a FAST EZ-EFI, where is the best place to mount it? They have a series of led's on them which I would not want to hide…

Claude.

 

I mounted my FAST EZ-EFI ECU to the passenger inner fender on a custom bracket for that reason. I could have ran it through the firewall but there is no space under the dash with the vintage air.

 

I did the same for a FiTech LSX Ecu. cut a measured rectangle in the pass inner fender, just forward of where the hood hinges settle and welded a 'shelf' that sits in the fender for the ecu. It's really out of the way.