I picked up a set of used '70 Stage 1 heads that were ported/polished. When I went to install the intake things just didn't line up well to what I like. The seller said he knows that the heads were cut but he didn't know how much. Is there a way I can take measurement of the heads or cc the chambers and determine how much was cut off so I can make an attempt at making the intake fit? Also, I got a set of KB roller rockers but no instructions. Can anyone help me out with the install/adjust on them?