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SignUp Now!looks like 1/2 would help
jack lists the stock plenum spacers at $79 1/2, $89 1", $99 1.5"
Buick Grand National, Heads & Intake | Cotton's Performance Buick Grand National Parts & Service
give him a call to see about the new champ intake spacers
I think mine is .900 and I put all my vacuum fittings in it and eliminated the Vacuum block with a small piece of 3/16" alum. Looks slick.
Also I have noticed my rear 2 cyl's 5 and 6 are way up in 200 degrees egt's with this intake setup just at cruising speeds so far. Still have not logged a full boost run.
Looking at my pics above, can anyone make a recommendation ?
I just pulled the 1" figure out of my a$$.
Also... any idea what $$$ they sell for ?
You can have one made in a bridgeport. Not very hard for a tool maker or anyone familiar with a bpt. You will need to delete the vacuum block most likely since it will hit the hood. Just tap into the spacer and use either hard lines or barbed hose ends
I think mine is .900 and I put all my vacuum fittings in it and eliminated the Vacuum block with a small piece of 3/16" alum. Looks slick.