Hi Adam. and welcome....

the term Rat rod can be interpreted many different ways/
when i hear that term I think of a car that was put together with parts you have laying around or budget built.
but most Rat rods are crudely built and look unsafe to drive.

by your question I would think that you are looking at building a full fendered "streetrod" that you want to run in primer or unfinished till a later date

not trying to get picky but rat rod means different things to different people. I think yours would still be a street rod, just my opinion




anyways here is a place that lists fenders for a 39 dodge
http://www.rrfiberglass.net/dodge_plymouth.htm


a dodge dakota chassis could be made to fit but you "WILL" have to modify the floor quite a bit but the ride would be worth it.


a mustang II frontend is also a good choice for that car and a 8 3/4 rear from a "B" body fits great too.

I would go that way if your frame is in good condition
it takes a little work but you can trim and fit a stock must II cross member and save the $$$$ on the cross member,

but an after market cross member is the faster way to go, just put it on and weld it up, where with the stock mustang cross member you will have some time invested in trimming it down to fit.

I am sure Gene will give you some good info Too. Ron....



does it look something like this???