Try this tech tip, might give you some ideas.
http://www.stovebolt.com/techtips/bigbolts/p30swap/

If money is a big concern then mostly stock, or with a newer 235 or 261 might make the most sense. Also think about a dual circuit brake system.

Grigg



•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-