While that may seem like a major drawback, the two engines were intended to be used for very different things. The Pontiac 400 was a high performance muscle car engine. The Chevy 400, meanwhile ...
so the W72 models were engines that had been stockpiled and would be used for the next few years on the high performance Trans Ams. While the W72 model of the Pontiac 400 was the most power ...
Although high-performance engines were long gone by 1977, Pontiac did its best to give the Can Am proper oomph and dropped the W72-series V8 under the hood. The 400-cubic-inch (6.6-liter ...