225 slant rebuild for more power

Pull the head, Mill it .100 thousands if it has never been touched, that will get you to 9:1 area But measure piston deck height to get in the ball park and cc heads,

clean up the head while you are at it carbide bit off amazon less than 20 bucks port it out a bit just smooth out any casting flaws dont go crazy add 340 springs,

get some split exhaust manifold or run a 2.25 exhaust head pipe under you stock manifold

recurve that distributor swap over to electronic ignition

super six it but get ready to redo the whole linkage and kick down also need a early v8 gas pedal assembly

Send your camshaft to oregon Cams get a regrind or pick out something for torque cause you got a heavy car.

Should have a nice cruiser while maintaining MPG and adding HP