7 1/4 stock 400

I put a stock 60's 383 in a '72 Valiant. I INTENDED to just leave the 7-1/4" in long enough to get it to and from the muffler shop. I ended up leaving it in for a couple weeks. It was still a 2.94 geared peg-leg, with stock 13" tires. Smoking the one skinny from 30+ mph was too fun, and it got done a bunch. Within the 2 weeks, it got REALLY noisy, and I swapped in the 8-3/4" before it was too late.