I have always taken stock 340 up past 6000. Some stayed together for a long time . Some couldn't take it once. Everyone I put a hole in was a 4spd car shifting third with steel mounts. Always number 7 or 6 right behind the mounts? I think the strongest that i have owned at high RPM's were the 383's Them dam motors took a beating. I had many RR's and Bee's. After a couple drinks back in the 70's I would try and blow them up. Hold some flat to the floor with the clutch in for a couple seconds and then let the clutch fly and pull second as soon as the car would leap.
The GTX's and R/T's 440's couldn't take that. I would put the Dana and the 18 spline in the 383 cars add a solid lift cam and you would have a indestructible carnival ride .
Yeah I was stripping B's back then I was hard on them and used the parts myself. Back when street racing was fun when they didn't have radials. If you didn't have slicks on you didn't stand a chance making money. Steel rims with Cheater slicks was the sly move.
