The TrickFlow heads have almost nothing to gain at the pinch with the odd shaped pushrod hole. I used my sonic checker and was getting a strange reading that I didn’t interpret right and went through. I didn’t care as I was going to weld them up and run a .350 offset rocker Harlan Sharp made for me. But of course it’s easier to weld before you get a hole but I got her done. Following TrickFlow for over 10 years of running my fingers through their ports even before they offered any Mopar heads I’m very disappointed finding advertised 300 cfm ports flowing a turbulent 285 or worse. I’ve gotten 343 cfm out of a stock location pushrod Edelbrock head with a 2.08 valve. If you read that link I posted what did he get out of a TrickFlow head with a 2.08 valve??? Something like 308 right. I’ll modify them and make a nice set of heads but in the end I doubt if I’ll ever run them. One of my stupider purchases. One of these Sundays I’ll grab one and throw it on my porting bench and do some quick testing.
