Zenish,the 4.3 never came with a T-5 except for a few years of early Astrovans.The 4.3 in the S10 came out around 88 or 89 with auto only,was 91 when the 5 spd was offered.And that 5 spd was the NV3500,a more rugged unit.The 4 cylinder S10's probably had the T-5 a little longer.