5.9 Mag stock LB or rebuilt SB

Keep the opinions coming. I’ve been reading up on many different magnum builds throughout the forums, but I’m specifically looking at what you guys would prefer to start with.
To clarify, I will be swapping in a four speed in place of the 3 on the tree and of course a new rear end which I haven’t decided on yet. 8.25, 8.75, 8.8 are all on the table still. I’m leaning towards 3.73 or 3.91’s.
If I went short block I suppose I could order a set of forged pistons at .020 over. The guy said it had a cam for torque because it was going back in his truck but he got hurt and project no longer viable for him.
I haven’t decided on heads yet either. I wanted to look into IMM’s heads, but if I decide to get spendy then I’m going trick flow. I know some have had good results with these Chinese heads but I’d prefer to stay away from them.