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-   66-67 GTO Tempest & LeMans TECH (https://forums.maxperformanceinc.com/forums/forumdisplay.php?f=430)
-   -   HEI Clearance? (https://forums.maxperformanceinc.com/forums/showthread.php?t=882370)

Picketwire Bob 09-26-2025 08:48 PM
HEI Clearance?
 
I've searched this particular forum but haven't found an answer. The question is, will an HEI distributor fit into a 67 Tempest? By that I mean more than just firewall clearance. Can a guy install and remove an HEI with the engine in its normal bolted in position? I'd like to get some feedback from others before I spend the time trying to set the HEI I've been running on my 455 that is getting installed. TIA

Goatracer1 09-26-2025 09:33 PM
I have one in my 1967 GTO. Same car.

b-man 09-26-2025 10:05 PM
It’s the first-gen Firebirds that have clearance issues because the engine is set back so close to the firewall, the HEI is not a problem with any year A-body cars.

Picketwire Bob 09-27-2025 09:06 AM
Many Thanks !
 
Thanks for the input. The car right now has a 326 with points distributor and it looks tight!
I had a 69 FB that a previous owner had taken a big hammer to the firewall so the HEI would clear. I wasn't sure if he did that for the HEI on a Pontiac or the BBC they said he had stuffed in there before that.
Good to know. One more concern addressed.

george kujanski 09-27-2025 10:01 AM
Hei in my '67 GTO 455. No issues.

George

ZeGermanHam 10-03-2025 11:01 AM
Plenty of room to swap in an HEI on your '67 Tempest with the engine in place.

Picketwire Bob 10-10-2025 08:35 AM
Thanks, guys
 
Appreciate the replies on this question. The car is in the body shop so I had no was to experiment with the 326 that is sitting in it right now. Just wanted to verify fit before I invested a bunch time and money in an HEI.

hobbygto65 10-11-2025 09:10 PM
It won't fit if you plan on running a tripower.

oldman66gto 10-14-2025 04:50 PM
Quote:
Originally Posted by hobbygto65 (Post 6586135)
It won't fit if you plan on running a tripower.
Not trying to steal the thread, but have a 428 w/HEI in my '66 GTO.
Am going to hve tri-power installed when I get back to Florida.
What would be the best "standard" size HEI distributor to replace the current one?

Currently has an Edelbrock 4-bbl on a "Torker" intake, with the "HEI" distributor.

Thanks for your suggestions.

Allan Bishop

67Lemons 10-14-2025 06:52 PM
Quote:
Originally Posted by oldman66gto (Post 6586484)
Not trying to steal the thread, but have a 428 w/HEI in my '66 GTO.
Am going to hve tri-power installed when I get back to Florida.
What would be the best "standard" size HEI distributor to replace the current one?

Currently has an Edelbrock 4-bbl on a "Torker" intake, with the "HEI" distributor.

Thanks for your suggestions.

Allan Bishop
Standard issue HEI won’t fit with tri-power, you’ll need to either use a modern small body HEI or Ready to Run distributor or a points distributor.

fyrffytr1 10-14-2025 07:33 PM
Quote:
Originally Posted by oldman66gto (Post 6586484)
Not trying to steal the thread, but have a 428 w/HEI in my '66 GTO.
Am going to hve tri-power installed when I get back to Florida.
What would be the best "standard" size HEI distributor to replace the current one?

Currently has an Edelbrock 4-bbl on a "Torker" intake, with the "HEI" distributor.

Thanks for your suggestions.

Allan Bishop
Another option is the conversion system from M&H wiring. I converted my stock points distributor several years ago and have not had a problem. I also installed the voltage regulator conversion from the same dealer with no problem.

https://www.wiringharness.com/


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