1971 GTO 455 at idle

New Summit dual Exhaust with Flowtec Headers on 455 Pontiac. Crane Max Velocity HIT284281 cam (234/242 @ .050" / .488 & .505 Lift), mild porting, Holly Street Dominator intake w. 870 Holley Avenger. 4 speed converted to TH400. Need to disconnect the backup lights!

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Proformance Unlimited Live Run Pontiac 455-425hp
Proformance Unlimited's Pontiac 455-425hp crate engine. Check us out on the web at http://www.proformanceunlimited.com. 800-267-3940 You can view our complete Pontiac engine line at the following link: http://www.proformanceunlimited.com/pontiac.html Proformance Unlimited is well known for it's custom designs. If you are restoring your early Pontiac we can upgrade the horse power and still keep it looking original. Whether your vehicle is a GTO, Fire Bird, Trans Am, Lemans, or a timeless classic, here at Pro-formance Unlimited we are here to help design and build the engine combination that will match you with your vehicle. Please browse our crate engines listed below or custom design one of your own. From that special built stroker engine to that turn-key drop in ready crate engine, call Doug or Steve we will be happy to answer any of your questions.





1967 Pontiac GTO 455 ( for sale)
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