Way back, when the car had a 528, we had a generic 10 inch B&M converter that we'd had behind a 440 in various guises. The car would run 10.60s and was real nice on the street. We got a custom 8in converter from ATi and also did a cam swap basically going to the next one down the page. After a couple of dozen passes we got the car to go a best of 10.008 @ 137 and run a handfull of 10.0's, mainly 10 teens. It was still nice on the street.
We ran the same 8in converter behind the 572 for many years but we always felt it slipped a lot, the RPMs would only drop 300 rpm on each shift.
The 655 has a custom 9.5in ATi for reference.
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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