This would appear to be a good 270 street engine, with plenty of useful torque in the low and mid-range. For more carburetion you might try two Holley-Webers (with adapters for your manifold), which are progressive two-barrels and should work really well for you at low speed while adding some more fuel at the top end when you might need it. That would allow you to keep your present manifold and your basic setup as you have it. Tom Langdon sells these carburetors and the adapters, and he might have some other recommendations that would help your performance.
A large-port 270H or 302 head is more useful on a bored-out 302 than on a 270. Your low speed performance from the 270 would suffer, without much gain at the top end.
God's Peace to you.
d
Inliner #1450
