Has anyone had any fitt problems with the Edel./GM alum. heads?
I have an old set of Blackjack's that I tried to fitt to my Edelbrocks today and the head bolts are hitting the bottom of the header flange?
T.C.

I ment to ask if ther is a problem with the Dynomax and the Alum. heads?
DUH!!!
T.C.

NO PROBLEM if they fit like the small blocks. I have the edelbrock RPM and summit ceramic coated(dynomax) on mine and they fit real nice.

edit...I'm using ARP head bolts as well..

ARP sells a bolt kit with shorter heads. I ran into the same problem with my 454 using RPM heads. The kit is less than 20.00

I had to take a die grinder to the lower flange... It would have been nice if I test fit them to the heads BEFORE I dropped it into the car... Had to pull it all back out again to clearance them...

Thanks for the replys:
The heads are allready on so the short head bolt deal is not an option.
I forgot to mention it is a BBC, 1966-L78 did you have to grind every flange?
T.C.

I had to trim the headers on my 502, because the bolts have a taller head.

http://www.chevelles.com/showroom/mild68ss/trimheaders.jpg

We had the same head bolt interference problem with Hooker Competition headers on a '74 454. By luck we had test fitted the headers to the engine while it was on the stand and corrected the problem. Made the job much easier.

That's great info! I'm getting ready to drop my 468 in my Malibu in about a month. GMPP heads (Edelbrocks) with Hooker Supercomp hedders. I'll test fit them on the engine stand and make adjustments as necessary. Thanks, guys! graemlins/thumbsup.gif

Thanks for the replys:
I was going to break the motor in with the blackjacks I have then put on a new set of coated dynomax.
Guess now I will just put the dynomax on and hope they dont get discolored during break in.
T.C.

TC,that's not a great bet to make, at least in my experience. Seems I always get a pipe or two too warm and dull the ceramic some. Might want to use the floor fan trick, since without, can almost guarantee you'll dull a few pipes.

Thanks for the reply 427L88:
Your probably rite, "MURPHY" hasnt been very good to me latley.
Besides I'll get practice grinding the headers.
T.C.

I have Dynomax headers on a Ram Jet 502. I had to grind the header flanges before they would bolt up..... graemlins/sad.gif

Anyone have any problem with them hitting a mini starter?
Or starter mounting block?
T.C.

I have a mini starter and clearance is no problem there.......

I have a set of Dynomax's Pro Series Jet Hot ceramic coated headers with 2" primaries. BB Chevy with GM Performance aluminum heads in a 70 El Camino. The fit is horrible. graemlins/sad.gif