1964 Dart 4 speed with overdrive

Slantsix64 said

So no body has used the later aluminum bell housing with the early abody four speed clutch linkage, probably going to have to try it out myself. Know the bell crank is different in the aluminum probably going to have a fab a bell crank, hopefully everything else mates up.

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I did it long before I knew about Brewers performance. I had already swapped over to a 71 340 bell Housing behind the 273. Next went in a hot 170 with an aluminum O/D bellhousing. If I remember correctly I just used that linkage and it worked great. Sooooo, maybe the Early A conversion stuff will get you there. It would be faster, cheaper, and better to just buy a cast iron 307 64 or 65 Main case and swap everything into that. No guess work and nothing else to buy.