Hooo boy! I would also like to do this.... but used alloy blocks are thin-on-the-ground, and those that are around are usually REAL used! Last one I saw had blown up so thoroughly, 4 of the lifter bosses were blown away. (Someone bought it, anyway....) Joe Fontana in Gardena CA is the source of 98% of all alloy Ford-type blocks. The retail-new price, with 4-bolt-main caps, is $3700 (same price for at least 10 yrs). As of last year he had no website, but his phone is (310)538-2505 TEll him you're with the Pantera club; this will likely get you no discount but is a talking-point anyway.