The headers I see on dragsters nowadays are not what I would call "zoomies" as they merge together at a common collector. I think of zoomies as being four separate pipes like the funny cars/top fuelers use. If the four separate pipes is what you are looking for, I doubt too many were made for SBC's ... might be easier just to find an old, used set of headers for the flanges and make your own (find someone with a 1 3/4" tubing bender, very common rollcage tube size, don't use the "muffler bender" it'll end up looking like crap). 

When we ran our front engine dragster I went to our local muffler shop and had them make up a set of zoomies and we placed a small "Zorro Muffler" sticker on the car in return. We were a pretty low budget operation and often worked trades and discounts with local businesses. We had a local Tim Hortons owner (had 9 stores) that gave us $500 and loads of free coffee and donuts whenever we went to the track and in return we took the car to one of his locations for a few hours on a Sat and also placed a sticker on the car. Had the same kinda deal with a local GM dealer and he would give us cost discounts on parts and in return had the car at his dealership for a day and a sticker on the car. It's all chump change for them and dealerships are always looking for ways to bring in customers. Valvoline in Mississauga hooked us up with 20 or 30 cases of oil for a sticker on the car and an 8x10 photo of it.