Exactly, when we bought the '71 340 Cuda in 1980 it was a hot street car, 3.55's, 26" Bias tyres, 3500 stall, .484hyd 750DP car, ran 13.3's all original body interior etc. I wanted to go faster and realised it wasn't going to do much more as it was so in went 4.30's, 4200 stall, big solid ft cam, 850DP, race hdrs but the same 26" tyres as at the time there was nothing taller available here, man that was hard work on the few trips down the freeway, 4000rpm@55mph, some would put up with that, I wouldn't, it drove great on the street on short trips but we gave that up as bad job and gave up driving the car to the race meetings from then on, I did the shows and the cruises by then and wanted more, ET was the most important for me and it showed..12.3's which for then was quite quick for a stock 10:1 motor, stock headed 340. You wanna go fast and keep it street-able, use a power adder, but don't expect to get that time slip with 3.23 gears and a near stock converter.