Brake booster and master cylinder assembly

Manual brake pushrod
4 bolt manual brake master cylinder

Or

Manual brake pushrod
4 bolt to 2 bolt master cylinder adaptor plate
2 bolt late model aluminum master cylinder

DoctorDiff has all 3 pieces. The adjustable pushrod, the firewall adaptor plate, and aluminum 2 bolt master cylinder with correct SAE threads to fit your brake lines. Will run you about $150. Great deal for a brand new MC thats sized correct to work with your stock diameter caliper pistons. Along with the adaptor, and adjustable pushrod.