Ive been running a stock cast piston 440,stock 452 heads with shims under the intake springs,stock 1976 new yorker cam since 1995. 6lbs boost,28 degs total timing no retard,eng cost me 5oo dol. Broke 1 cast crank balancer, makes a great cruiser .
Pics please. You say 28 degrees total timing then say no retard? Seeing how the factory big blocks run best around 36 degrees N/A I’d say your about 8 degrees retarded. Which would be about 1.3 degrees per pound of boost. Sounds about right.
