Manley Pushrod, P/ROD-4130 5/16 8.600 1998-pontiac-firebird-esi4271216 while the upper arms are

while the upper arms are adjustable for pinion angle and lateral location

oil pressure

450lb- Small block cruise

the mounting holes can only go so low

(4) 9/16" Nylon lock nuts and flat washers

Manley Pushrod, P/ROD-4130 5/16 8.600 1998-pontiac-firebird-esi4271216 while the upper arms areManley Performance Pushrods are engineered to deliver uncompromising strength, stiffness, and valvetrain stability in todays high performance engines. Manufactured from premium materials and precision heat treated for maximum durability, Manley pushrods are designed to resist deflection under high spring loads and extreme RPM conditions. Consistent wall thickness and exacting tolerances ensure reliable valve timing and long term performance in both