Originally Posted by Rusty

Both of my TA's had the 6.6 Pontiac 240HP motors. The way to tell a 6.6 200 HP Pontiac motor from a 6.6 240 HP Pontiac motor was the valve covers. The 240 had chrome valve covers and the 200 had painted covers.

The Olds 6.6 (403) didn't come until '79. '80 had the 301 turbo or the 307 Olds.