I read MadDart's post on FABO & very cool. I've also got Caltracs & 5" narrowed 8 3/4 w/ 3.55's. I forgot to mention my 68 S has fiberglass fenders & hood, so I gotta keep the exhaust temps down for sure. the 451 has eddy heads, TM6 intake, 440 source kit & is about 10:1, so I'll swap the pistons for 8:1 or 8.5:1 coated ones & the Engle hyd cam has a 112 lobe sep so maybe it'll be ok. I think its an AMC K57/58 grind or a K56/58. Twin turbos would look awesome.