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Back to back testing on a 103 vs a 107 no changes other that increase in CI as head gasket was .027 to a .040 to keep it as close as we could. Andrews 54 dd 2-1

103 94 hp 108 tq

107 97 hp and 112 tq.. So end of the day unless you have to go larger the gains are not going to amount to much. Now same build but getting the comp ratio to 10.2

99 hp 116 tq .. Again gains are small for invested amount.
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