carbureted 5.7 - 6.1

hemijoejr said

You have to be carefull and make wise decisions on choices. 11-1 with stock pistons and 5.7L heads , I dont think so. You also have to be carefull with cam selection and stock pistons. There is no doubt in my mind than more than 450hp is attainable with a stock bottom, mabe some head work, and a camshaft that will fit without valve notches.

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11:1 compression is easy. Even with stock pistons, but it does not happen with the 03-08 Hemi heads. Because you cannot mill them enough. Now go with the 09+ heads on an 08 and older motor and you can reach way high for compression. As they are a closed chamber head and the combustion chamber is much smaller. You will probably need to enlarge it just to get it down to an 11:1