5.3 heads
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Join Date: Oct 2010
Location: Houston, TX
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Yes they will bolt on. Just did that to my truck that had a cracked 706 head. They need to be milled some as the chambers are 64-65 cc vs the 706 heads with 61cc. Had mine milled 0.030" to get the chambers to 59-60cc and used the stock ls1 mls head gasket that compresses to 0.051 to give me about 9.9:1 compression.
Also when doing this you need to check your pushrod leangth as you are changing the valvetrain geometry around.
Also when doing this you need to check your pushrod leangth as you are changing the valvetrain geometry around.