It will require rebalancing, due to the larger pistons in a 4.1. If you weight the pistons out of a stock 109, and then weight the pistons out of the 4.1, they will be different, requiring a re-balance. But, other than that, it will work fine.
thanks guys for the response
my plan is to put the stocky ocky
stuff back in my 3.8 then billet main
arp stud heads/main the 4.1 do
something more out there with it
so i always have a base motor on
hand