
1970 Pontiac Formula 455 - The Green Monster






Engine And Drivetrain
With the factory drivetrain tucked away, Albert turned his attention toward his '73 455, using it as the starting point for the buildup. The 455 was sent to RP Motorsports in Woodbridge, Ontario, where it was bored 0.030 over to clean up the cylinder walls. This brought displacement to 462 ci. The pistons were replaced by SRP forged flat-tops with Speed Pro rings and Eagle H-Beam forged rods connected to the original nodular-iron 455 crank. The rotating assembly was balanced, and compression was bumped to 10.4:1 from 8.0:1 thanks to a head swap.
The 455's 114cc-chamber iron heads were shelved; in their place is a pair of 87cc-chamber Edelbrock Performer heads, custom ported by Astro Machine/RP Motorsports. The 2.11/1.66-inch stainless valves are augmented by Comp dual springs, and are actuated by Jesel shaft-mounted 1.65:1 roller rockers, Comp Magnum solid lifters, and Comp 5/16-inch pushrods. The solid-roller camshaft is a custom grind from Comp with 244/244-degrees duration at 0.050 and 0.603/0.603-inch lift.
A Melling high-performance oil pump fed from a Canton kick-out pan provides lubrication. A Milodon windage tray keeps the crankshaft free of excess oil whip.
Air is drawn through an original Ram Air air cleaner with a modified 800-cfm Quadrajet mounted to a port-matched Hurricane intake manifold. An MSD Pro Blaster 2 and Pro-Billet distributor deliver the spark through 8.8mm wires. The remains of the air/fuel mixture are shot through 2-inch primary Hooker SuperComp headers with 3.5-inch collectors. Behind the headers is a 2.5-inch, oval Spintech exhaust system
źródło: hpp