I have a 87 RCSB 350 TBI/700R4, changing to 5.3/4L60E. As I understand, the 4L60E is the same externaly as the 700/R4. If I want to keep the 4L60E in the same place (to avoid driveshaft work), which motor mounts to use? I understand the DirtyDingo's are adjustable, but do I need them or will the Transdapt 4572 work? I have read the threads, but it doesn't seem clear. Thanks in advance. I wouldn't attempt this if all you guys hadn't plowed this ground before and posted your success.