THIS WOULD WORK FOR THE EARLY MODELS OF ATC90, BUT THE HEAD GASKET WAS A WEE BIT DIFFERENT. SEE THE KO THRU K1 HEAD GASKET BELOW @ COMPLETE GASKET_SET ATC90_ATC110 K2_THRU_1983 7/20M (GS202A) GS202A @ *HEAD_GASKET CT90K0_to_K4 (ATC90_F/N_TO_1113934) ALL_S/SL/CL90'S ALL_CM91 12251-028-030 1/20M (R2192)THIS IS THE ALL ROUND HEAD GASKET THAT THE CT90K0 THRU K4 TOOK AND THE EARLY ATC90'S THE NEWER CT'S AND ATC'S HAVE THREE NOTCHES IN THE HEAD GASKETS. THE ALL ROUND HEAD GASKET WORKS FOR (CT90K0 THRU K4) OR AN ATC90 WITH A ENGINE SERIAL NUMBER SMALLER THAN 1113934 R2192 @ SUB_TRANNY COVER_GASKET (ALL_ATC90'S) (ALL_CT90/W/SUB'S) (ALL_CT110'S) 7/20G (CT9G1) (360Z) CT9G1 (360Z)