Is it cheeper to build or buy a complete rolling 31 chassis? Whos the best for the price? I live in MT so midwest or west cost works the best.
Maybe you should answer this question first...
'Is it cheaper to buy a used car or a new car?'
The same mindset applies to purchasing a "used roller" chassis. With a
properly restored chassis someone has built themselves, you typically have a rebuilt engine with a warranty, a rebuilt transmission, a rebuilt front & rear axle assembly, brakes that have all parts restored where they function properly, and a frame that has been straightened and all the crossmember rivets tightened. Add to that a fresh coat of paint.
With a used roller chassis, you typically find a chassis that was poorly rebuilt and now the engine is used-up (-and often hemorrhaging oil from the rear main), a transmission that whines in 2nd gear, a rear end that whines of the coast side, brakes that just barely stop, and a frame that is bent or sagging. Since the main thing you are buying is a group of 'core' parts, then these chassis' are fairly priced at $1,000.00.
I think the general consensus is that a restored Model-A that runs well, stops well, steers well, and is not a problematic vehicle is NOT bought as a donor car for a street rod. It is the cars where the engine has issues, the trans & rear end are noisy, the brakes don't stop, etc. are the ones that become donor chassis' for sale when they are dismantled. So if the latter is what you are after, then go for it, but don't be fooled just because someone advertises a "restored chassis" for sale.