how much more work is it to build 393 over 357 ? I dont kno what to do

ok im building a clevor I cant decide on what i should do ok here it is I have 74w block 70 closed chamber cleveland heads and 71 open chamber cobra jet heads. I just want to how much more MONEY AND WORK is it to build a 393 over 357? this what I kno so far for me to use the cc heads I got to build a 357 because of the compression buildin a stroker with cc heads will make the comp to high for pump gas but to build a 393 I can use the oc heads and run on pump gas

393
eagle cast 3.85 crank about $300 357 stock crank I have
custum forged pistons $600 for 393 custum forged piston $600for 357
eagle rods $300 or my stock rods for 393 stock rods I have for 357


SO it only cost me $600 more to build a 393 over a 357 right? Or am I missing something about how more money will it cost me to build 393? what kind of machine work need to be done for a 393 over 357?

the cost of crank and rods is the differance----
CR can be adjusted in the custom pistons design for either stroke