For sure Andy, my dyno is the track and it takes me a while to get out there. The problem with new heads is they all seem to have 78cc chambers, so without shaving i will lose my 12.5:1 compression. If i do shave them i end up back with very little clearance again. Right now just getting opinions from others and weighting my options. I'm really not liking this roller already because it has the same lobe lift at TDC as the flat tappet, so a new roller is in order or maybe even a new flat tappet. My Mopar engine shop said they have a couple different flat tappet grinds that have made 800hp on their dyno. Also with the availability of the TF270 and the -1 requiring new headers and who knows what else i might just keep what i have. I'll have some time next week to get some accurate data. Thanks again