1999 sonoma

Hi y’all, first post on this forum. About a year ago I bought a 99 sonoma with 63,000 miles in automatic. Since I started messing with it, I thought about manual swapping it although I have no clue what transmissions even fit the engine model. It’s a rwd single cab. I appreciate any help or advice.

I will be swapping a 355 Small Block in my 99 Sonoma. Estimated at 320-350 HP with a mild tune. Using a 4l60e, and I know I'm going to need a new torque converter. But what kind of power can you put through a stock rear end. I know the 7.5s aren't known for the indestrucibility but would it be...