Is it worth it???

When I was 18/19, I rebuilt my engine, with the help of two friends..... I watched the machine shop do some of the work, like pressing the pistons on the rods..... I also had him put in the freeze plugs and the oil block offs....

If you have a good assembly book, it's not rocket science. We were teenagers, you are someone that has done it in the past. You'd do fine.

But, if you feel comfortable having someone else do it, and have the money, (which I didn't back then) then go for it!