Chad
IF I am remembering right,the 250 WP has 2 bolts and the 144-200 has 3.The later 200 WP is almost 1/2"(?) longer.Don't recllect the yr break. the 302 pulley had a bigger dia. and deeper nose(offset).I didn't have a selection of pulleys for 6's,so I used Moroso 64035 pulley shims to move the pulley out to match groove.This put the pulley almost flush with the centering dowel on WP and put the alloy front fan spacer into the radiator.Which is why I went elect. fan on this app.
Nowdays when I'm junkyarding,I take EVERY.LAST.PULLEY. AND.BRACKET.Mismatched pulleys are a pain.
In order to put the C.I. 2 groove on the 'chero,I will have to put these moroso shims in the same way and maybe have to mod the rad. support,which will interfere with the elect fan/evap. coil/hood latch.
But all that is after 8" swap,brand eecchh s10 swap,polara redo.These 30 somethings need guidance..
R