Big block 400 in 70 GMC Sierra Grande?

[2tons of fun]

Originally Posted by 425HP409

In 1970 due to tightened emission laws, Chevrolet bored the 396 out .030 inches to make it a 402. There was no actual 396 in 1970 and later. They also changed to a low riser intake manifold. The same engine in a Chevelle was still called a 396 for sales. The SS396 had made a name for itself and they didn't want to mess with it by calling it a SS402.
The same cubic inch displacement engine was put in the trucks but named a 400 for some reason....

thats funny, because i just pulled a virgin 396 out of my 70.