I'm beginning building my 440 into a stroker engine for 100% street use. My builder recommended a MOLNAR crankshaft and rods. From what I have read they seem to be good quality but my question is can I use MOL4264250MC6F which is a 4.250 stroke hemi 8 bolt crank in my 440 block or do I have to use the 4.150 6 bolt crank? The price is the same but I get a few more cubic inches with just a little more grinding. Is there any differences between the 2 cranks beside the stroke being longer and 8 bolts instead of 6?