I wouldn't hesitate to use a set of Trick Flow CNC heads on a any low compression small block with some thin head gaskets. You're going to see some improvement just on account of the smaller 60cc chamber. I'd much rather risk having a cylinder head that's oversize for the application with 9 plus something to one compression with some actual head flow than a smog head with 8.4:1 as a starting point for a "real" performance build. IMHO, you need all the cylinder head you can get when you're depending on atmospheric pressure to fill the cylinders...
