I ran my swinger stock for a couple of years till I threw a rod at about 130+ racing a Mach 1 Cleveland. Who I slapped around pretty good but when I pulled over to let him catch up he was pissed and took off with the girls I jumped in and held it to the floor down a 2 mile straight away to catch up, it was the original motor with over100,000 miles. Here is a list of some of the cars I remember that I beat. ProBuild Oldsmobile 400 442, 302-69z Camaro, 70 383 Challenger 4 speed, 1970 383 roadrunner 4 speed, 72 AMX 402 4-speed, 72 350 El Camino SS built, 289 high pro built 66 mustang 4 speed, 66 GTO tri-power, 68 GTO 400 4 speed, that's just some of the ones I remember so I guess you can see why I loved the 340 it made me a star LOL after we built it well that's a whole another list.