[TWX]

A friend of mine built a monster of a 496 from a 440, and he still has cooling issues from time to time. Bigger than that probably requires a new block with siamese-cast cylinders, and I would think that problem would be magnified with the 361...

 

[TWX]

Just so that you keep it in mind, there are two variants on the big-block family.

https://www.allpar.com/mopar/b-engines.html

The 350, 361, 383, and 400 are "B" engines, and generally things like intake manifolds and valley pans will interchange.

The 413, 426, and 440, with one or two years of a different oddball 383, are "RB" engines, or "Raised B". Their intakes and valley pans will not fit a "B" engine.

Heads should fit all years.

I suggest that you purchase a book on building big-block mopar engines. "HPBooks" has offered such books in the past and they can be quite useful, often casting numbers and other such parts are specifically identified.