The 068 is NOT a big cam.
The gains from going from 8.0:1 to 9.0:1 with this cam will be marginal, no where near as much as we'd see if something like an 041 cam was being used.
I have less compression and a larger cam in my own 455. With a stock torque converter and a 3.08 posi, I can smoke the tires off idle with ease.
Runs fine on 87 octane, doesn't overheat, and is reliable. If it isn't being built to race, then no need to push the limits.
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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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