I'm going to do that same thing with a 6.2 rod from carrillo and a 2.1 big end but its real hard to find a good crank with the chevy size in a 3.85. I had a 4 inch stroke crank with the same rod in a block and it didnt need any clearencing either. Trouble was the pistons were to tall so i sold the 4 inch crank. Im looking for a 4340 steel crank now. C.a.t. lists one now but there not making it yet. With world products coming out the blocks would like to get one with a 2.75 main or one with an o2 main could realy spin that one with a stroker.