Install Location	Driver Side	Passenger Side
Casting Number	4X (1H)	4X (1H)
OEM Applications	73-74 455 LV	73-74 455 LV
Casting Date	J053	J053
Valve Size; Ex / In	1.66 / 2.11	1.66 / 2.11
Chamber Size; Stk / NHRA	112.3 / 102.3	112.3 / 102.3
Valves; Included / Length / SP / T	N/A	N/A
Springs Included	N/A	N/A
Spring Installed Height; O / I	N/A / N/A	N/A / N/A
Spring Avg Pressure @ inst ht	N/A	N/A
Retainers Included	N/A	N/A
Splitocks Included	N/A	N/A
Screw-in Studs; Included / Bosses	N/A / Y	N/A / Y
Rockers Included	N/A	N/A
Pushrod Guide Plates Included	Y	Y
Valve Grind	N	N
Guides	N	N
Ported	N	N
Flowtest	N	N
Hot Tank	Y	Y
Clean / Painted	N / N	N / N
Assembled	N	N