V8 swap info

I see nothing wrong with a 904. You can either hog out the one hole for the converter, as the 904 converter has a non symmetrical bolt pattern, or use the older flex plate, if you are not using EFI. The magnum converters are symmetrically drilled. The difference is, that the weights for balancing the assy are on the converter for the 904, and on the later Mag flex plate for Mag engines.

If we go this route, I do not plan on using the EFI, but in either case, I think the point you are making is don't mix and match. Use the older LA style flex plate with the older style TC, or a newer style Mag flex plate with a newer TC, ya?

You are aware? I hope? that you need a small block V8 bell bolt pattern, you cannot use a slant 904

Yup, i am aware of this one.