AMC 1" Valve Cover Spacers with Evacuation port ... Jeep / American Motors Corporation Engines (290, 304, 343, 360, 390, 401)  These Spacers are engineered with an additional port on the rear intake manifold side  of the head on each side of the motor taped to take a 3/8 pipe fittings to be used for Evacuation Port SOLD IN SETS (Two Spacers) Made in the U.S.A. from 100% U.S.A. Billet Aluminum ** WILL NOT WORK WITH STOCK ROCKER ARMS ** * Stud Kit not included with 1" spacers - look in Stud Kits for your specific application. Buy Now

AMC 1" Valve Cover Spacers ... Jeep / American Motors Corporation Engines (290, 304, 343, 360, 390, 401)  SOLD IN SETS (Two Spacers) Made in the U.S.A. from 100% U.S.A. Billet Aluminum ** WILL NOT WORK WITH STOCK ROCKER ARMS ** * Stud Kit not included with 1" spacers - look in Stud Kits for your specific application. Buy Now

AMC 1/2" Valve Cover Spacers ... Jeep / American Motors Corporation Engines (290, 304, 343, 360, 390, 401)  Includes stainless steel bolts and washers  SOLD IN SETS (Two Spacers) Made in the U.S.A. from 100% U.S.A. Billet Aluminum Buy Now

AMC 3/8" Valve Cover Spacer ... Jeep / American Motors Corporation Engines (290, 304, 343, 360, 390, 401)  Includes stainless steel bolts and washers  SOLD IN SETS (Two Spacers) Made in the U.S.A. from 100% U.S.A. Billet Aluminum Buy Now