Hey Justin, I will let you know hopefully soon what my quote is going to be from a Pontiac builder in SC. I am also going with the stroked 400 with forged rotating assy and eddy round port alum heads with custom Hyd roller cam and Performer RPM intake with 800 cfm Qjet. I have heard pretty consistently that it will run about $1000.00-$1500.00 for the block machine work and then what ever else for the assembling the engine. If the price you are saying (4-5 grand) includes the price of the alum heads and him assembling everything, I would say you are probably pretty close, but I think that would also depend on what kind of cam you are going with. The price of most of the parts for a Hyd roller cam and parts needed for that are going to run around $900-1000.00, so I would say that you are going to be pretty close to your estimate, take or give around $500.00. That is just my guess. GL man and let me how that pans out for you. SF!!