Rad support won't have the engine code on it tho...just year, plant and sequence number. 383/4bbl would be an H code. Im sure some have been made, but ive never seen an XP29H8 charger. Kinda like an H code sport satellite. You'll have to dig and look for those tell tale signs of its former life. Alot more likey a G than an H, considering the shape of C and G.