Trick flow 240s on milder builds versus Edelbrock RPMs

^ in agreement with Andy.
Just an FYI, I think you already have pistons but if you don't, there is a 1.35"CH Mahle piston that could work with a full deck height block. Advantage for that piston is it has an -8cc volume for valve notches and that works well with the 78cc combustion chambers in the TF heads for a 451 build...