Rebuilding g a 92 350 5.7 tbi

as many as it takes, you always come across something that needs extra attention. But who is building it? It would take a re-manufacture a day or two.

Me but I'm just replacing all gaskets seals cleaning everything up and probably going to put better heads gotten any opinions

Ya, The one thing that restricts you is the OBD1 computer. Depending on exactly what you want to do, So like what heads were you thinking about? And how many miles are on it? This makes a difference for what you do with the heads. I don't know what mechanical skills you have, so I foresee this taking at least a week as far as time.

On the heads, if you have a lot of miles on the motor, refreshing or putting different heads on could pull oil up past the rings, then you would have an oil burner. Thats why I wanted to know on how many miles are on it?