You could always go with a cheap little giant or something simular submersable water pump and make you a cheap resevoir. Lowe's has some for around 16 bucks, but you might be able to find something simular other places, just look around. For tubing, if cheap is what your looking for then go with vinyle, not the best, but can be bought at Lowe's/Home Depot for about $2.00 for 10 feet and will certainly do the job. Also the 1966 Mustang heater core is a good one, alittle taller than the chevett heater core, but not quiet as wide and the same price at autozone. Search the forums on resevoirs, you should find plenty of ideas. Also might want to keep an eye on ebay for water blocks, sometimes you can snag homemade blocks, or even manufactored blocks for cheap.