hello i got a 92 chevy im putting a solid axle into in the process of doing a cummins swap trying to figure out the best way im gonna make my own system cause i got to a high school with every machine tool known to man hass cnc mill and lathes and stuff like that was thinkin 4 link with air bags or ladder bar with air bags maybe torsion arm like a dodge dont no just gonna be a daily driver and weekend toy nothing hard so wat u guys think would be the best?

 

four link would be nice, but just remember how heavy a cummins is. if you want simplicity, i am very happy with my leaf sprung swap using powerstroke springs. its alot nicer ride than the 73-87 chevy springs

 

4 link with bags was actually my original idea on mine, but i just didn't have the cash for that much DOM. The leaf setup works well and doesn't ride too bad with the weight of the cummins on it.
x2 on using longer springs if you do leafs. Another option is using 52"(iirc) rear chev springs with the overload taken out. I've ridden in one truck set up with them and it rides pretty nice.
How big of tires are you wanting to go with?

Another option is a radius arm setup with coils.