Mike, (runningbwdog)
Here's what I got with just the info you supplied as I could not find any other info on your # 15 heads w/ 1.96 intake valves...kinda small and big exhaust valve 1.770:
RPM scale starts at 1500rpm and ends at 5500rpm
Hp Tq
115 403
166 435
213 447
262 459
309 464
333 437
341 398
324 341
285 273
Jeff
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Carburetor building & modification services
Servicing the Pontiac community over 25 years
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