A guy in a 69 Chevelle SS396 got beat 4 times, one from a dead start and one from 70 MPH to over 100 MPH. He got so pissed, he followed us into the store parking lot, did a lot of yelling and kicked the right rear quarter panel.
Both rear quarters had 22 pounds of lead shot poured in so they were SOLID as a rock and he broke his foot.
Would have loved to have seen video of That. there are many who spend alot of $$$ in a Summit catalog, put it all together and it don't run for anything...it makes them mad because they drained their bank account and still don't go fast...:)
if you really know your wrenching, you can comb a junklyard and build a fast engine from used factory parts. you have to know what works with what.