Well considering a new world block is $3500.00 VS a used 440 block for $100.00 (which is good to 800 HP) without 4bolt mains You are already $3400.00 ahead. Real hemi heads (bare) with rocker assemblies are $3500.00 bare minimum. for a total of $7000.00 for a real hemi. for $4100.00 You can have a 440 with hemi heads. And about pistons, You can get ROSS ARIAS or JE in 4.350 which is .100 over 426 off the shelf piston. Total cost of a 440 wedge conversion is about $8000.00 HALF of what a real hemi crate motor is. The 440 ends up a 446 cu in. without stroking it and will make WAY more HP the a crate hemi. For those who are curious, go to "Converting a Wedge into A Hemi" on google or yahoo. This explains all the block work that is needed. Nothing major, most can be done at home with hand tools.