It seems like you'll do it anyway and money is no option since this will cost a good headstart on the 340. But we told ya so. (I had to say that now so I don't later when your having fits with things)
Ramcharger! Performance parts for the POLY engines are not hard or to expensive. The hard part is intakes and exhaust issues. The only game in town is TTI headers @ around $600+ buckaroo's or exhaust manifolds.
Swap meets can yeild factory iron 4bbl.'s and even the Weiand 4bbl. unless your very willing to wait for a Weiand or Edelbrock triple set up which would be almost as hard as a dual quad intake the factory had.
Racer Brown has a great many camshafts on a list just wating to be ground. Somewhere around a 100 or so was sent to me once.
Many LA parts swap over. Look to the land of the Aussie's for a RPM style intake that may yet be produced by enthousaistatsteadnkw, MoPar crazies!