Would the 153 use the same dampeners as the 6s? It just has a hub and pulley now. Are the combustion chambers on the 153 head the same as the standard 6 cyl head? I'm thinking of using a comp 260H cam. It has a 1200-5200 rpm range. I am planning on using 1.60 exhaust valves and 1.85 0r 1.95 intakes. It's a street engine, what do you think? It's .040 over and will probably stay there.
"I wonder if God created man because he was disappointed in the monkey?" Mark Twain
