Thanks for that, Dan. i ve meaning to call you for a price on putting a #4291 production 4.1 block together for me with a girdle and a eagle stroker crank and K1 6.350 rods- i already have the block and some stage 2 ross pistons (from a 3.625 stroke and 6.5" rods stage2 motor) which i guess i could use for the build up. Let me know what your opion on this is.Thanks.