IF IWAS WANTING TO GET IN THE 11'S I WOULD NOT PUT THE 400CI ENGINE BACK IN IT IF I HAD THE MONEY NOT TO I WOULD GO WITH A 327CI WITH A SET OF TRIPPLE VALVE SRING DOULBLEHUMP HEADS AND U NEED TO DO SOMETHING A BOUGHT THAT REAR SUSPENSUNIF POSSIBLE I JUST GOT A 72 PICKUP TWO AND THE WAY THAT THE REAR END BOLTS UP U WILL LOSE TRACTION BUT I CANT TELL U WHAT TO DO WITH IT