Slant six Cast Crank

Bad news man.
The 4-speed alone won't help you do burn outs unless your slanty has some real oats, and you really rev it up. This is because the M/T low gear(2.66) is not significantly different from the A999(2.74), and you gave up the torque multiplication of the auto.
What you really need is a TUNE-UP, a looser TC, and probably more rear gear.
And no peg-legger burn outs! Sooner or later the cross-pin will vacate it's home and destroy the rear end.So get a SG and hard skinny tires.