I run the clevor in my 65 mustang. i use the boss 302 heads because the swap is a little easier. it is storked out to 410 C.I. I have a high port edelbrock high port intake with a 950 HP carb, but before that i ran the torker II intake for the cleveland with adaptor plates. a 700 lift roller cam, mild port work to intake and exhaust bowl area and ports. with port plates on the exhaust. the intake ports flow 335 cfm @700 and exhaust flows 225 @ 700. i use a stock 77 windsor block with a main girdle. 14.1 pistons, I have about $1300 in the heads; race valves, springs, titainium retainers, port work, and plates. I rev the engine to about 7800-8000 rpm. engine has about 60 passes on it with no issues. the first 25 passes i didn't even pull a valve cover. i have taken the engine apart and check everything over with no issues found. the car with me in it is, 3140lbs. it has a 4 speed, so its wheels up every pass. so far it has run 10. teens at 130 mph. the engine makes good power and I'm pretty sure this year it will go in the 9.80 area with a little more suspension tuning.
Its pretty much up to you and what you like. I enjoy NOS stuff. have fun and see you at the races !!