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I'm new to the forum and also to the build world. Just want some good respectful, opinions, and ideas, how how to build my 73 grand prix 455. First like to start with what size carb and flowmasters?
THIS ADVERT HAS EXPIRED!
FOR SALE: 1973 GTO Sports Coupe one of 519 made with the 455 CI motor with automatic transmission. California car. All original number matching drivetrain. Motor turns over but 2 cylinders only have 5 pounds compression. Not running. Have original build sheet that was found in the car. Well optioned. Clear Minnesota title. Asking $5000. Make offer. No scammers please. Cash upon inspection of the car. Located 25 miles south of Minneapolis, MN. Call or text 612-599-1641.
- FOR SALE
Good afternoon all-this is my first post here . I have a 1970 GTO that is getting a 455 installed ('73 block casted in October 1972 with 6X heads). What alternator and power steering brackets do I need? I know the brackets have to be the same year but any advice? Thanks.
Hey I have come across a '76 Trans AM I am going to "restore" I'm not completely worried about keeping it original although I am keeping any original parts I would replace; heads, cams, etc.... Well I have the original 455 engine I need to have some work done on it, and I want to beef it up some as I know in '76 it took a huge power dive to about a 200hp engine. I was wondering if anyone had any ideas or information on what kind of upgrades I could get on the engine (like aluminum heads possibly, or a better cam) and what kind of compression ratio I should get it set to. I'm under the idea that the original compression ratio is 7.6:1 which is pretty low, so what might be an ideal compression ratio? If anyone has any information that would be helpful to me that would be great. Thanks Nick
i've had a 73 ventura with a 350 sitting in the shop a couple of years and today i bought a 455 from a 70 Bonneville. everything shows this YH block to be the 360 hp rated engine with 2 bolt main and it has the #15 heads. I have a set of 6x-8 heads from a 77 400 and wondered how low the compression is going to go if i run those heads. The 6x have the 2.11 valves with dual springs and i think they will flow better, but i would like to keep this 455 pushing 400 HP. I haven't decided on a cam yet until if find more info on which heads to run