BE SURE TO USE A RADIATOR WITH A LARGE ENOUGH VOLUMN TO PREVENT OVERHEATING EXAUST WILL HAVE TO BE CHANGED .IF A STICK USE A 11 INCH CLUTCH FOR SURE . I PUT A 10.5 BEHIND A 348 ONE TIME AND IT SLIPPED IN HIGH GEAR .MIGHT HAVE TO EXTEND WIRES DUE TO LONGER ENGINE.IF USING A 350TH WOULD RECOMEND REFRESHING TRANS TO MAKE SURE HAS A CLUTCH PACK THAT WILL HANDLE THE 427.