I'm going to keep my question short and to the point. I have a 1977 Oldsmobile vin R 350 with 3a heads. If I replace those heads with the early #5 heads (port, polished, divider weld, new valves, springs, etc) what would happen performance wise? I know about enlarging the head bolt holes. Also, would I need a different head gasket from stock and if so, what thickness?
I have had these heads collecting dust for years. Now I have a few pennies to spend. I have no intentions of not keeping my Olds all Olds powered but when you start looking at performance to value ($$$), it just hard not to go another route with GM performance.
I have had these heads collecting dust for years. Now I have a few pennies to spend. I have no intentions of not keeping my Olds all Olds powered but when you start looking at performance to value ($$$), it just hard not to go another route with GM performance.