You could save some bucks vs a 4" crank by offset grinding the rod Journals to the popular 2" "327 SBC" size and find anywhere from a 6.125" to 6.3" .927 pin SBC rod and get to about 3.90" stroke PLUS get a lighter bobweight. If I already had the crank I'd probably look at doing that...or sell it to offset the cost of the 4" to 4.25"

I have a 4.25" BPE in my 440" W2, it's a BEAST but very docile