HEI for '69 Cutlass
#4
Will a GM-HEI fit with a factory stock Air breather snorkel system for a 68-72?
I have heard rumors that the GM-HEI will Hit the back of the Air breather for 68-72.
The rumors said you have to switch to a 1973 Style air breather for the proper clearance with the GM-HEI.
Is this true?
Does anyone have an pictures of a GM-HEI with a stock air breather 68-72?
I have heard rumors that the GM-HEI will Hit the back of the Air breather for 68-72.
The rumors said you have to switch to a 1973 Style air breather for the proper clearance with the GM-HEI.
Is this true?
Does anyone have an pictures of a GM-HEI with a stock air breather 68-72?
#7
On a small block the HEI will not clear stock height intake/air cleaner or with Performer. Air cleaner housing mods necessary or a spacer between carb & air cleaner. I have used Chevelle cowl induction spacer (steel) or cheaper plastic spacers are available. Have not seen hood clearance issues with SBO & flat hoods.
HEI will clear with Performer RPM and standard air cleaner housings.
On my blue car I run HEI with RPM or presently Street Dom, OAI, housing has large fabbed notch for dist and its been “compressed” to lower the housing relative to carb, half height foam to hood.
Red ‘70 runs ‘68 OAI system w/ RPM, HEI, no housing mods.
HEI will clear with Performer RPM and standard air cleaner housings.
On my blue car I run HEI with RPM or presently Street Dom, OAI, housing has large fabbed notch for dist and its been “compressed” to lower the housing relative to carb, half height foam to hood.
Red ‘70 runs ‘68 OAI system w/ RPM, HEI, no housing mods.
Last edited by bccan; February 16th, 2021 at 09:12 AM.
#10
Actually, you also didn't consider the difference between a BBO and SBO. The distributor is at the same height relative to the cam, but the taller deck on the BBO pushes the carb an inch higher. The Torker increases that even futher. You can use a HEI with stock air cleaner on a BBO with no problems (assuming you don't have a Toro intake with the depressed carb).
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