Jeg's is selling Edelbrock Hemi heads complete really "cheap". $1250 for roller and $1220 for hydraulic heads and with coupon code $100 off on $1200+ purchase. Wonder if you need to play the game with 2 separate purchases ? I know not to trust the valve job on the heads. What is the difference between roller and hyd heads, valve springs? The install is an other issue because my bore is 4.28" they say 4.37" minimum. Is it as simple? as eyebrowing the block .090" at top of bore and .090 down? Any other warnings? Not sure I want to get into that, but what the hell.