273 318 dual quad

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Re: 273 318 dual quad [Re: Sniper] #3229092 04/25/24 10:39 AM 04/25/24 10:39 AM
Joined: Sep 2003 Posts: 19,534 north of coder moparx "Butt Crack Bob"
moparx "Butt Crack Bob" Joined: Sep 2003 Posts: 19,534 north of coder	Originally Posted by Sniper Originally Posted by poorboy Yep, I believe drilling the mounting holes a bit larger diameter solved that problem, it seems to me the threaded holes in the 273 and the 318 heads were at a slightly different angles. Opening up the holes on the intake allowed the bolts to be threaded into the heads and the slight difference in the angles didn't cause any sealing issues. But it was a long time ago. Exactly right, that's how I put a Performer intake on my 65 273. did the performer intake have the small ports ? what size did you drill the holes to ? did you use washers under the bolt heads ?

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