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 Post subject: HEI on 1965 389
PostPosted: Mon Nov 14, 2016 6:36 pm 
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Joined: Mon Aug 15, 2016 2:00 pm
Posts: 2
Year and Trim: 1965 Bonneville Hearse, 389/TH400
Can anyone tell me or show me with a picture if a standard-size HEI will have enough space without hitting the firewall? Should I get the smaller diameter HEI instead? Also, would an HEI unit for a '70s Pontiac fit the 1964 389? :dontknow:

Thanks!


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 Post subject: Re: HEI on 1965 389
PostPosted: Sat Jan 07, 2017 1:34 pm 
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Joined: Wed May 13, 2009 10:45 pm
Posts: 5527
Location: CHICAGO
Year and Trim: 2006 STS-V, 2004 GTO, 2009 G8 GT
It should work, I've seen it on GTO's of that vintage.

Here is a good read on conversion (which includes a link to a converted '65 GTO);
http://www.pontiacstreetperformance.com ... rsion.html

Quote:
HEI, 1976, spring kit installed, 10 degree initial, 24 mechanical, 34 degrees total in by 2400 rpm, adjustable vac advance, 9 degrees

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Retired Bonneville Owner and former GM Tech:
2004 Pontiac Bonneville GXP: Black/Ebony *SOLD*

Summer Toys: Combined 827 RWHP / 877lb/ft RWTQ
2004 Pontiac GTO: Impulse Blue Metallic/Black/M6: lots 'o mods, 415 RWHP / 405lb/ft RWTQ!
2006 Cadillac STS-V: Light Platinum Metallic/Light Gray/A6 - Spectre CAI, Magnaflow exhaust, Speed Inc. tune, 412 RWHP / 472lb/ft RWTQ

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1999 Chevrolet Suburban: Sunset Gold Metallic - Daddy's winter beater and plow truck


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