83 K20 cast torque converter cover for gear reduction starter?

[MARKDTN]

I have an '83 K20. Replaced the original 350 with one from a '90 Corvette. With the deal I got a Corvette gear reduction starter, but it did not fit the cast aluminum torque converter cover. I didn't want to modify it so I kept the original starter. Now 15 years later I need a starter. Is there a cover from a later year that will fit a 700R4 and a gear reduction starter and have the bolt mounts for the braces? Maybe like a '96 K1500? Or 4.3 4WD Blazer?