I'm unsure on the 331", but if you find something let us know.
If you're wanting to gain cheap horsepower inside, you may want to think about a windage tray, low tension rings, higher compression, lighter pistons, oil restrictors, galley plugs to keep windage off the camshaft, lighten the rods, degree the camshaft, balance the engine, blueprint the oil pump, and I have heard to primer the lifter galley to gain faster oil drainback into the pan.
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93 Thunderbird 5.0 HO
89 Firebird L03
95 F150 XL
Get ready for the 351 boss build this summer, 4v closed chamber heads, 2.25/1.75 valves, .750 lift, 12.5:1 piistons, wieand tunnel ram, nitrous, I think its gonna roar!
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