Small Block Full Length Header Options - Ground Clearance
I've always thought Doug's Headers were well-designed and constructed. Very solid product for the price, IMHO. Don't have their A-body headers (yet) but have used Doug's on other projects and never looked back.
I know the OP mentioned
full-length headers, but someone's got to throw the Schumachers in here...
http://www.engine-swaps.com/Pages/ProductsType/SB_Headers.html#head4