I did just what you are wanting to do 30 years ago. Didn’t have anybody close to rebalance it, ran it the way it was, worked fine, no vibration. Was a four speed car, used original pistons and rods, also. Was back in my not so educated days. ???Jim
64 Dodge Coronet 440. In progress 1998. Dodge Avenger. 8.35@165. 4400 DA 250” Neil and Parks Slip Joint. 7.36@183. 4600 DA 242" Mullis Dragster. 6.90@ 200mph