The biggest problem with the 455 Olds, is that the block is SO f'n tall. Most of the intakes have a horizontal "S" curve to them, and gasoline does NOT like to flow down-up-down. If you run some sort of cowl induction hood, allowing an intake manifold that will flow only downward, THEN you can get a 455 to run decently. Otherwise, a 403 is a better choice IMHO.
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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'.
'67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust
My webpage http://lnlpd.com/home
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