Sounds like a fun trip....I've finally located a shop that can "re-balance" the balancer. I've already had the entire assembly spun..engine re-assembled....didn't have the new H/B so they went with the stock unit. Found the rods were mismatched....13 grams out...replaced them. That would have been a real rattler!!!!
I ran into a problem with getting it checked or balanced at local shops. Their center core shafts were all too large (1-1/8") for the cones to center the (1-1/4"ID) balancer. Finally found a guy this afternoon who says he can do it!
As for balancing...I'm a firm believer! "I know it's only an old truck engine"....but it's done, I know that my internals are all matched and that it will be smooth!!!
Have a good safe trip...please mention to Steve that I've found a balancer source, if you would.
Thanks,
Dave