When we had this motor on the Dyno we were talking to the tech and he figured that the reason why it was producing so much power was mostly the heads.
They're Dart heads, that were machined by Bill Mitchell
This link shows some of his work
http://www.theengineshop.com/116_0303_block_pg1.shtml
The cam is also BIG, and we burned about 1 U.S. gallon of fuel for every minute that the motor ran.
The pistons are flat tops, and the heads were origionally made for dome pistons, so they were angle shaved to boost the compression to 10.3 to 1
The carb is a holly 1050 double pumper, and the dyno showed that it was just about perfect for the motor.
If you run a motor onto a dyno try bringing in an assortment of both carbs and jetts to fine tune it.
Plus we had to order some gaskets that weren't available in BC's third largest city, so look into that ahead of time.
My friend built the motor up for about $6000 watching the car swaps for parts.
The heads were new, along with the carb and the intake manifold.
The bottom end was a former racing motor, that had the oil pan sucked dry destroying some bearings.
The machine shop fixxed this easily.
If he would have bought a crate motor with the same stuff it would have cost him $12000 - $15000.
My friend also builds up small blocks. His specialty is 400ci small block chevy's.
I could ask him for advice on any subject if you want.
