1970 Slant 6 in a 1983 Dodge B150

Just realized that this is “for A
Bodies only” I’m an idiot this isn’t even close to the right place to post this question, I’m sorry everyone don’t mean to waste anyone’s time.

Hi all,

I have a 1983 Dodge B150 with a 225 Slant 6 that is losing oil pressure when warm and will likely soon need a rebuild, but still runs great at the moment (other than losing oil pressure)

I’ve always loved older vans and bought this one for a good price as my first project and don’t really know what I’m doing yet, so I want to buy a cheap 225 and rebuild that one instead of ripping apart my currently running engine (probably stupid but I don’t care).

I have the opportunity to get a 1970 225 for under $100 but with it being a cab over engine I’m worried it may not fit right because I’m pretty sure the 83 has a shorter block. Does anyone know if the 1970 will fit in the engine bay and to the transmission?

I apologize if what I’m saying is completely stupid, like I said I’m new to this and am trying to learn. I appreciate any help.

Thank you!