Best 273 and 318 builds (NO 360's please)
Also I will need new pistons
should I use flat top or domed?
Wont know really what I can use till I rip the engine apart.
Thanks again
Depends on the head used, so once you know what your going to use, a 318 ported or a 360 head touched up, you can go from there. The reason being is the head cc amount will drop the ratio alot with the 360 head.
From a 318 head to a 360 head, the drop can be this much.
9.90 down to 9.12. (.78)
Or the reverse going back to a 318 head from a 360 head.
So if the 318/360 head combo was built at 9.5-1 to start with, then you go back to a 318 head, it would go to 10.28 -1
With the above cam(s) recomended, pump gas could be an issue. Because the cam is small and may not bleed off enuff compresion down low...thus pinging will arrive.
Also, a domed piston designed for a 360 head will not fit into a 318 head with it's smaller chambers.
