RB20:
- either use mckinney mounts or crossmember
- use stock driveshaft
RB25:
- Use mickenney mounts or crossmember, RB25 tranny, and custom driveshaft (little customization to tranny tunnel)
- or use RB20 tranny and stock driveshaft
SR20:
- just bolt it in
So whats easier and cheaper?