I agree completely. Pontiacs top performance engine in '70 was not the 455 in a GTO. That is why they are not comparable to a '70 W-30.
On a side note. I took my drivers license test in a gold '70 W-30 442 4 speed conv.
Steve Barcak
www.pontiacheaven.org
"Real Poontiacs only....no corporate nonsense!"