No, a 1995 Chevy Suburban transmission will almost certainly
not bolt directly to a 1975 350 engine. The bolt patterns, bell housings, and input shaft diameters are different between the transmissions used in those vastly different model years. The 1975 engine likely used a much older style transmission (likely a TH350, TH400, or SM465) with a different bellhousing design compared to the much later 1995 Suburban, which likely had a 4L60E or 4L80E automatic.
You would need an adapter, and even then, it's a complex and potentially unreliable solution. Finding the correct transmission for your 1975 350 is the far simpler and more reliable approach.
