Any downside? What to look out for? '71 383, guess they are advertised at 8.7:1 compression. Lunati 220/226@.050" .475"/.494", Performer RPM, 1-3/4" headers. Before I break the stock heads off, are there any problems to look out for? Are the cylinders too small for these? What about head gasket bore size and thickness? Do I need different head bolts? Is this more trouble than it's worth?
