Hi,
I have a 462 with cast #15 heads and XE268 cam.
I have a street twin clutch and pressure plate, 4-speed M20 and 3.55 rear gears. 9.35:1 compression. 10* BTDC initial and 34* total adv.
From a rolling start, ie clutch locked up, it will chirp the tires, 215/65R15, and that is about it. I did two chassis dyno runs and have 360 ft/lbs torque and 240 rwhp. I suspect that your cam is mild, just like mine. You should consider an XE274 or maybe even a XE284.
There may be other cams with more LSA than 110 that may perk up your performance.
Just a few data points to consider.
Mike
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1968 Pontiac GTO 462CID, 4-Speed Manual, 3.55 rear. Aleutian Blue exterior, 219 Teal Blue interior. Chrome bumper, AM & 8-Track and Rally II Wheels
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