349 CI on the cheap

Outlawracer,
They sell new cranks with the mains already the right size, so they wont be turned down and can get them as cheap as or cheaper than the machining cost of the turned down crank.

As for the heads why would you put larger valves in, this would create valve shrouding and a loss of flow as the cylinder will only pull so much air and thats it. Also to the larger valves will slow the velocity down in the heads so now filling the cylinder quicker becomes harder. Or the need for higher compression is needed to help pull the air fuel charge in.

As for the heads I would do what you have listed for $950.00 complete, and they would flow as good or better than the eddy's and cost less. And have better velocity than the eddy's. To me eddy's have 2 things that IMO go against them 1. the Int. valve is too big for this size engines bore and 2. the port size is much too large for this enigne and bore size, and the bore will never utilize the port efficiently, when a smaller port will make more power and Tq. and be more efficient.