Quote:
Originally Posted by cttempest
18's? again 10.5 c.r..the exact opposite of what I want.
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Depends on your setup. You shouldn't think of the factory number as more than an initial guideline.
18s are going to be difficult to find anyway. I haven't seen more than 2 pair in person, in 20 years of the hobby. Maybe 2 for sale on the forums. But Assuming you don't deck and have 0.02 in the hole...68cc chamber.. 0.030 over. It would be 9.4 to 1! Close to 10 to 1 if zero decked.
The 17s I have were something like 78cc. This is why you need to do your mocking. After this you may want to cut the heads etc.
do you have pictures of the current shortblock?