got a 90 subturden its got a 454 in it now with a broke crank ( long story ) NO IM NOT PUTTING A 12 VALVE IN IT so my choices are another 454 or a 6.0 . still going to keep my 465 &205 combo with a 14bolt and 4:11s with 33s . for what it would cost for a 12 valve , 5 spd trans , t case , drive...