[Schurkey]

Does anyone remember details of the Pontiac engines used by GMC?

In '55, they used the Pontiac 287 (but called it a 288), in '56 they used the 316, and in '57 they used the 347. Wikipedia lists two different 336 engines from '58 and '59:

GMC's own V8 was the 336 in³ (5.5 L) OHV/pushrod engine. It used a 3.875 in (98.4 mm) bore and was produced only in 1958 and 1959.

While both the '58 and '59 GMC V8 engines were advertised as 336 in³ (5.5 L), the '58 version was based on the Pontiac 370 in³, but with a smaller 3.875" bore giving a 336.1 in³. The '59 version was based on Pontiac's 389 in³, but with a smaller 3.78" bore giving 336.9 in³.

source: http://en.wikipedia.org/wiki/GMC_V8_engine#336

1. Can anyone verify the two different 336 engines?

2. Anyone want to dispute or add to the information above?