What motor to go with?

My friend wade who is a member of this site runs a 10.1 340 w/tunnel ram.....and a 904.

No issues, and I sold him the trans to know thee is no $pecial magic done to it other than quality parts-clutches/bands and a transgo shift kit.

You're not gonna blow it up, but then again...there some really lame people who can break anything if they are allowed abuse and tinker it enough..not saying ur one, just saying it like a disclaimer.lol