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167 Posts
Couple of reasons. I run "race" converters, and found it is more difficult to have a converter built with the small splines. By having the converter built with the small crank pilot, and the large splines, gives me more options, since race converter prices start about $400, and go up from there.
1) early engine, early trans with the later front parts.
2) early engine, late trans
3) late engine, with pilot adapter ring, and early trans, with the late front parts.
4) late engine , with the pilot adapter ring, and a late trans.
PS the larger splines are stronger, but should not be an issue with a slant
1) early engine, early trans with the later front parts.
2) early engine, late trans
3) late engine, with pilot adapter ring, and early trans, with the late front parts.
4) late engine , with the pilot adapter ring, and a late trans.
PS the larger splines are stronger, but should not be an issue with a slant