340 with a 3.79 stroke what you guys think?

I have a chance to buy a 3.79 stroke crank and .040 over pistons for my 340 .03 motor will make it a 396 this will be a flat top compared to my 11 .1 dome what you guys think? will it pick up with less compression? also was told this a mopar crank made by callies anyone heard this?