elderbrock performer 600-750,, or stock 625 afb ??
750 is too big for what your intentions are, Big is NOT always better unless there a set boobs, & even then theres a limit there 2, stay conservative sense its a 318 & primarily street driven.
Here is one of many on e-bay.
http://cgi.ebay.com/ebaymotors/Edel...r_Truck_Parts_Accessories&hash=item45fc5f1c10
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