II have a nostalgia funny car with a 511 kb hemi and powerglide trans.10in converter 5000 rpm stall. 11.5:1 compression,fuel heads,14/71 24lb @30%,180 low gear,430 rear gears w 34.5 tires. Present cam has 294 duration @50 installed at 40deg btdc.fresh 110 pump. My problem is that it is down on power everywhere in the rpm range,best of 7.59 @175,1.12 60ft times.Launch rpm is 4000rpm and I suspect that is too low for this cam. This isn't a TAFC,just trying to get it to run in the 6.60-6.90 range.I have talked to a couple of cam company's and they all seem to say the same thing that the cam has too much duration. Have any of you guy's run a combination like this and what were the cam specs? Thanks for any help.