[kman400]

I have a newly rebuilt 400 that runs OK but has very little bottom end torque. It’s a 69 YS block 30 over and stock 62 heads with valve job and springs. New pistons brought the compression down to 9to1. I’m pretty sure of this number although it was the first time I had checked an engines CC,s. The intake is a Performer as is the carb (600CFM). The cam is a Comp Cams XE262H with a 218 IN. and 224 EX. @ 050 and a total lift of 462 IN. and 470 EX. with matching lifters. Degree wheel was used during install along with a new stock harmonic balancer. Stock exhaust manifolds and a new Gardner exhaust system installed…a little restrictive. 400 trans with stock, used torque converter and 293 open rear end. Cam break-in appeared uneventful, temp never broke 190, oil change after. With 300 mile on engine compression check ranged from 155-160 psi. One concern the vacuum at idle is only 10in HG. Timing is set at 14 degrees initial and 20 degrees mechanical for a total of 34 degrees. MSD ignition system including distributor, no vacuum advance. The car runs and drives great, it just a dog off the line/ stoplight. If nailed at a stop it will chirp one tire for just a second. It seems to pull pretty good after that thought. I know its not a 13 second setup but I think there should be a little more. Any help would be greatly appreciated.