That is pretty much where I have landed is that the duration is just to much but I didnt want to just shoot from the hip this time. I had a 509 (4.500 bore and 4.00 stroke before in my personal car with pump gas and a powerglide and 4:10 gears but a smaller roller, comp cams 714 714 and 260 and 270 at 050, it was a awesome motor! I think the 3 speed trans really helps to get the 60fts back in check too if you can control the torque. I do appreciate the info, it does help alot. I also have just built a 505 (4.310 bore and 4.250 stroke) with GM 990 rectangle heads and on pump gas with a smaller solid lifter cam of 620 620 and 256 and 262 at 050 and it has a 110 lobe sep. It has converter 4600 stall and 4:56 gears and a 32inch tall tire and it has run a 6:93 so far. It doesnt have a dominator, it has a 950cfm. Just having bad luck lately and I am not happy with the results. These two 505s are in two different cars and I have checked all the obvious with timing, throttle adjustment, fuel flow and pressure, jetting. The engines are running clean and good......just not real hard. I appreciate your time in response!!
CC