Well the results are in, I give the trickflow 240s ! That is two thumbs up! From a 10.29 to a 9.75. That is a half second from changing the heads from home ported 906 with bigger valves to the 240s. My car is in the left lane and my son’ 1968 dart with a 440.
Well I got my TF 240s in and doing some measuring. Looks like they are going to work. Piston to head, piston to valve, and valve to cylinder wall clearance checked out with the cam straight up. Now to take it apart and clean and reassemble...