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Originally Posted by NKOTB
...What I do have is a PI intake on 427 low-rise heads... I've not heard that is is a mis-match before...DD
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David, from my previous post: "A Medium riser intake will fit on low riser heads, with a
possible port mismatch."
The PI intake is a low riser intake, no mismatch there. The carbs sit lower on low risers than medium risers, so you've got all the clearance you're going to get from the motor, other than using a different air cleaner. The reason I said a medium riser intake
may give you a mismatch between the intake and heads is because of what SOBRAC mentioned earlier about low riser intakes having the same port sizes as medium risers. The yellow "Ford Performance" book shows this to be the case, but there are several incorrect size statements in that book, so at this time I say they
might cause a size mismatch until I get info from another source. Not that you want to install a medium riser intake on your car because of the clearance issues you already have, but FYI, you cannot port match a medium riser intake to "tall" low riser heads, as the medium riser intake doesn't have enough meat below the port to open the port up enough. The low riser intakes, PI, Cobra Jet, etc.
can be port matched to "tall" low riser heads.
In short, the parts you have all match.
Dan
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