Match Race 1972 ~ 'Duster 340 vs 'GTO 400'

Part of the problem with the GTO was the weight of that body. The other was the the later 400 block was a real dog..... The late 60's 455 on the other hand was not. Put that drive train into a lighter car and you have something quick. Like many others here I do have and have had cars outside of Ma Mopar. I recently built a (brand X) 1969 Chevy Nova SS but did not use chevy for power. Instead I went with a 1968 455 Pontiac GTO block, with 78 6X heads (bored and stroked to 500 cubes) anyway enough of the specs. The thing is a monster in the light weight nova body. Point is the reason for the slow times of the later 400 is the later smog era 400 was a real dog. Partially due to compression and also the heads used. There was a high performance head and higher compression available on the firebird that was not a dog at all.