What heads are you running ?
Have you MACHINED the open parts of the chambers to EQUALIZE THE DEPTHS from one end of the head to the other ? Measure the depths of the open part of the chambers , but you need to do it with the PROPER TOOLS , NOT a ruler and feeler blades .
Has the block been DECKED to SQUARE IT ?
.020 is A LOT , the block isn't that far out , the pistons aren't rocking that much , if they are you have too much piston to wall clearance .
What rods are you using ?
Has the crank been cut ?
Isn't setting the quench distance FUN ?
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