this cam will add torque and HP at lower and middle RPM ranges

Fits: > 65-78 B

17509-54A D-rings

Fits: > L37-E77 4-speed B

A special feature allows use of the tachometer wire for a link to a laptop PC

Hasting Rings Pan/Shovel 74" +.030 Styren this cam will add torqueStd cyl. bore: 3. 4375" (87. 312mm). 1st ring: 1. 6mm. 2nd ring: 1. 6mm. oil ring: 4. 75mm. Tech tip: Piston grooves vs piston rings. It's not difficult to determine if a Hastings piston ring set will fit a certain piston. You should measure the height of the piston groove in the piston itself. The 2 top grooves will be for compression rings, the lower groove will be for the oil ring. In most cases Hastings oil rings are of the low tension 3 piece