I got to wondering about specs on LS vs SBC specs for gmt400 swap candidates specifically bore/stroke and rod/stroke ratios so i did a bit of diging and got carried away. Here's what i found. Some specs were corvette only and such but all were production. Let me know of any errors.
LS 6.0 rod 6.098 bore/stroke 4.00/3.62
Rod to stroke ratio 1.68/1
Weight 580lb
300hp - 370hp
LS 5.7 rod 6.098 bore/stroke 3.898/3.62
Rod to stroke ratio 1.68/1
Weight 460lb
305hp - 350hp
LS 5.3 rod 6.098 bore/stroke 3.78/3.62
Rod to stroke ratio 1.68/1
Weight 580lb
270hp - 310hp
LS 4.8 rod 6.298 bore/stroke 3.78/3.27
Rod to stroke ratio 1.92/1
Weight 580lb
255hp - 285hp
SBC 5.7 rod 5.7 bore/stroke 4.00/3.48
Rod to stroke ratio 1.63/1
Weight 530lb
145hp - 350hp
SBC 5.0 rod 5.7 bore/stroke 3.736/3.48
Rod to stroke ratio 1.63/1
Weight 530lb
150hp - 230hp
LS 6.0 rod 6.098 bore/stroke 4.00/3.62
Rod to stroke ratio 1.68/1
Weight 580lb
300hp - 370hp
LS 5.7 rod 6.098 bore/stroke 3.898/3.62
Rod to stroke ratio 1.68/1
Weight 460lb
305hp - 350hp
LS 5.3 rod 6.098 bore/stroke 3.78/3.62
Rod to stroke ratio 1.68/1
Weight 580lb
270hp - 310hp
LS 4.8 rod 6.298 bore/stroke 3.78/3.27
Rod to stroke ratio 1.92/1
Weight 580lb
255hp - 285hp
SBC 5.7 rod 5.7 bore/stroke 4.00/3.48
Rod to stroke ratio 1.63/1
Weight 530lb
145hp - 350hp
SBC 5.0 rod 5.7 bore/stroke 3.736/3.48
Rod to stroke ratio 1.63/1
Weight 530lb
150hp - 230hp