I have yet to see any bad comments about Molnar products anywhere that I've searched. How are they accurately measuring rod length at home? How good are their tools? I'll bet that the measuring instruments at the manufacturer are a hell of a lot better than what most people use, including me. To be honest I didn't measure the length before hanging the pistons. If the deck height checks poor I'll investigate the cause. In my experience there is a stack up of correct crank index/stroke, pin location in the piston, and rod length. I've personally never built a motor that measured exact deck on all 8. I think a lot of builds miss import measurements and sweat the stuff that in most cases means nothing. How may measure lifter bores for size and placement, ring side clearance, bore for out of round and taper to the .000X? I'd rather have a few .0001" extra on he bearing or miss the deck height by .003" than have lousy bore or ring groove dimensions. Just my 2 cents.
Doug