We do this also and as Pat says about what sizes you can do in what blocks--deck height and where the cam center line is raised to is everything--that is with the stock GM bore spacing--most mountain motors will be with bigger bore center lines

I reviewed the parts list for this ad and all the parts except the Dart block are lower quality name brands---

We build the 540-566 range Dart block engines with Callies cranks ,rods, CP pistons---the taller deck over 4.250 crank engines get Callies Magnum cranks--

Our prices for the 540-566 are currently 4428 shipped, the 632 are 5600 shipped USA.

We aren't trying to pay off any state of the art CNC equip or two 50,000 sq ft buildings--