Crossmember question

Thanks for responding. The 73 Swinger was originally a /6 car. When I bought it there was no engine/trans or driveshaft installed. So far I installed the entire K member, 318 and tranny from the 72 Valiant. Other than this trans mount issue I had minor threat with the pitman arm fitting. I'm also wondering if the drive shaft will work ok? Not really sure what the wheel base is..

From what I'm gathering I'll need to see where I can find a spool mount to make the 318/904 fit the 73?

Thanks again