its true, Chevy used the 396 in 69 then the 402 in 70, they used both engines in both years at diff plants, there was a strike in 70, things were kinda messed up. they called the 402 a 400, guess it sounded better. sometimes they used 400 badge on the fenders for both engines-a few were listed as 396/400 so even GM didn't know which one was in what vehicle, kinda like the 350/400 small block was used interchangebly in the mid 70s. In 71 they added the small block 400 so two diff engines were called 400 for a short time as the 454 replaced the 402.brian
