You’ll figure it out.
#1 rule.
Do it yourself, don’t trust anyone else’s rebuilds.
Sounds like you learned that now. So many folks smash shit together then wonder why it only lasts 100mi.
And #2 rule
SEARCH!
If you look up hobbit engine rebuild or something like that on MA ( select “ ALL DATES”) there’s so much info here. Read read read. That’s key. That’s how I learned everything I did (edited)