LS1 In a 2000 T/A

Alright so this is my first rebuild so any hints or helpful criticism is welcomed things come along.

I already had the motor torn apart and got the bottom end spec'd out. The bottom end is completely stock minus some Clevite bearing and Mahle piston rings.

The to top end however is another story. From camshaft all the way to the rockers,leaving only the cylinder heads themselves and both exhaust and intake valves stock. Currently in the middle of a "Port & Polish" on both sides. With more emphasis on polishing than porting.

Anybody have any advice on repairing block threads?

I just pulled some from my the holes that go to my cylinder heads.