Since you are in the area of these folks

www.jimmeyerracing.com ..

Contact them with local people that can do a swap for you, At the same time they can mock up a 440 for you, etc .

The biggest issues on the "later" pre-war and post war frames is the stock spring pockets really cut into your stock frame and they have a taper that makes a swap a bit harder


And, the starter being where is is makes the steering shaft a bit difficult to plan around, just have to put some extra thoughts on it

Comes down to skil, tools and place to do it at


Mine turned out well but, it was a challenge to make it correct