I just got off the phone with Summit Racing. I called because in their catalog, and Edelbrock's catalog, the LS conversion headers #65073 are supposed to have 3.5 inch collectors and are intended for 68 - 72 A-body cars. The headers I received from Summit have 3 inch collectors, which according to the Edelbrock catalog, are headers #65043 and are not intended for 68 -72 A-body cars, but for 67 - 69 F-body cars. Has anyone else ordered A-body - 3.5 inch collector headers and received 3 inch collectors instead? According to Summit, it is a misprint in both their catalog and Edelbrock's catalog.
Have I mentioned how badly these headers fit? I bought everything Edelbrock tells you to buy such as the motor mount adaptor plates #6701 and the proper Energy Suspension motor mounts #3.1114 and the headers touch the frame badly. Not sure what to do, so I thought I would share my frustration with fellow "Converters" and see if I'm not the only one having these issues. Sorry about the rant. By the way, Summit Racing was great and apologized for the "misprint" in their catalog and will be correcting it ASAP.
http://i996.photobucket.com/albums/af89/bj71chevelle/3inchcollectornot35inch.jpg

Havent bought or tried to fit them in a Chevelle but I would imagine if they were intended to be for an F-Body then they would not fit well at all. So, Summit is sending you the correct Chevelle headers with the 3.5" collectors then? Sounds like they are making good on the mistake. Let us know how the correct ones fit.

Mine have the part number stamped on them. I haven't installed them yet, so I'm not sure of fitment.

mine are 3" as well, so it is a misprint. i would put the body back on, or at least get your driveline angles set before you worry too much about the fit.

what motor, what tranny, what tranny crossmember? if its just setting on the stock one then that is probably your issue. how much do you need to tilt the motor up to get them to clear? how much room to the firewall? can you flip the edelbrock plates to move the motor back? all questions i would answer before running out and getting new headers. dont worry about having the motor at X angle since you cant reference it to anything anyways. just make sure your driveline angles are correct at ride height and go from there.

Tim

Havent bought or tried to fit them in a Chevelle but I would imagine if they were intended to be for an F-Body then they would not fit well at all. So, Summit is sending you the correct Chevelle headers with the 3.5" collectors then? Sounds like they are making good on the mistake. Let us know how the correct ones fit.


They aren't sending me anything, since according to them, I have the correct set. I'm not convinced, but I can't argue the point very well since the box, the order form, and the headers themselves all have the correct product number - the only discrepency was the 3 inch collectors instead of 3.5. Summit says it was a misprint in their catalog. I may have to modify the header tubes??????????? I will never recupe my $140. brokerage fees paid to UPS. We Canadians get hit hard with these "added fees". Too difficult to send back. I think Edelbrock mis-labelled this set and Summit is not to blame for that. I may have to contact Edelbrock. The saga continues. All part of the fun they say. Ha Ha.

mine are 3" as well, so it is a misprint. i would put the body back on, or at least get your driveline angles set before you worry too much about the fit.

what motor, what tranny, what tranny crossmember? if its just setting on the stock one then that is probably your issue. how much do you need to tilt the motor up to get them to clear? how much room to the firewall? can you flip the edelbrock plates to move the motor back? all questions i would answer before running out and getting new headers. dont worry about having the motor at X angle since you cant reference it to anything anyways. just make sure your driveline angles are correct at ride height and go from there.

Tim

Thanks for your advice. I am actually breathing better now. I appreciate your insight and you make very good points. I will certainly not give up on the headers yet and do more "fittings". Thanks again.

is your plan to run 3.5" exhaust? what motor are you going to run?

Tim

Here are some pictures of my frame mounts. Does anyone besides me think they may be too far forward and causing my fitment issues? Any thoughts?

http://i996.photobucket.com/albums/af89/bj71chevelle/100_0810.jpg

http://i996.photobucket.com/albums/af89/bj71chevelle/100_0808.jpg

what front drive setup are you using? if its not going to interfere, flip them around, which IIRC only lines up 3 holes. drill your 4th, and youve now moved the motor back for proper clearance. again its IIRC, especially since i welded mine on.

edit... it looks like yours have a third hole on top and bottom and will flip around. from what i remember from tear down pics, my old mounts sat that far forward.

Tim

what front drive setup are you using? if its not going to interfere, flip them around, which IIRC only lines up 3 holes. drill your 4th, and youve now moved the motor back for proper clearance. again its IIRC, especially since i welded mine on.

edit... it looks like yours have a third hole on top and bottom and will flip around. from what i remember from tear down pics, my old mounts sat that far forward.

Tim

Since the accessory drive kit for Corvettes #19155067 has been discontinued for an indefinite period of time, I'm not sure which drive setup I'm going to go with. Excuse my ignorance, but what did you mean by IIRC? I will try flipping the mounts. It looks as though that may be the solution. I will give it a go. Thanks for the tip.

Since the accessory drive kit for Corvettes #19155067 has been discontinued for an indefinite period of time, I'm not sure which drive setup I'm going to go with. Excuse my ignorance, but what did you mean by IIRC? I will try flipping the mounts. It looks as though that may be the solution. I will give it a go. Thanks for the tip.

IIRC - If I remember correctly.

The Corvette Accessories are discontinued that stinks.

my sb mounts look like that.
so if you flip the mounts around will you still have to use the adapter plates then? im new to this lsx swap, and love to learn.

thanks

aaron

edit

it seems the part may be discontinued. they are asking to email for availability..

http://www.gmpartsdirect.com/results.cfm

My swap into 67 chevelle my mounts sat flush with rear of crossmember and still had 40 mm clearence to firewall I brought hooker headers and I had a few clearence issues too had to change from aussie starter moter to I suppose USA type because it hit headers and they still sit close to rear right side top control arm bush bolt/washer but that is probably just wheel alighn issue once springs settle it may get better with new alignment

I bought the edelbrock headers and adapters. I used prothane engine mounts and put the engine in this past weekend with NO fitment issues whatsoever. I put the motor in and then slid the headers in from the bottom side.. no issues. I am not sure of the collector size of my headers.

I bought the edelbrock headers and adapters. I used prothane engine mounts and put the engine in this past weekend with NO fitment issues whatsoever. I put the motor in and then slid the headers in from the bottom side.. no issues. I am not sure of the collector size of my headers.


Do your frame mounts look anything like mine? I suspect your mounts are further back on the frame cross member?????? Could you take a picture of your frame mounts?

Here are some pictures of my frame mounts. Does anyone besides me think they may be too far forward and causing my fitment issues? Any thoughts?

http://i996.photobucket.com/albums/af89/bj71chevelle/100_0810.jpg

http://i996.photobucket.com/albums/af89/bj71chevelle/100_0808.jpg

Those are the correct frame stands. You do not need to flip them around. I have the same ones on my GTO. You DO need to use the Edelbrock adapter plates. They will position the back of the LS engine in exactly the same place as a BBC or SBC used to sit. The number one tube is a little close to the crossmember, but it fits fine. The back of your trans needs to be up as much as possible. This will make your headers fit perfectly and also make your driveline angles better (assuming you are lowering the car as most people do).

Andrew

Those are the correct frame stands. You do not need to flip them around. I have the same ones on my GTO. You DO need to use the Edelbrock adapter plates. They will position the back of the LS engine in exactly the same place as a BBC or SBC used to sit. The number one tube is a little close to the crossmember, but it fits fine. The back of your trans needs to be up as much as possible. This will make your headers fit perfectly and also make your driveline angles better (assuming you are lowering the car as most people do).

Andrew


Thanks Andrew. I won't be doing anything for a while, but I appreciate your input. I just can't get past the fact that the collector tubes point upward when I tilt the engine enough to clear. I did use the Edelbrock adaptor plates. Thanks, I will do more test fitting once the body is on the frame.