Master Cylinder question

[Scarface]

Does the MC piston have a deep hole, or a shallow cone-type hole? Manual brakes usually had the deeper hole and the power brakes had a shallow hole with a retainer that kept the pushrod from falling out. I'm not sure what your application is but if you currently have a manual setup, you might have to make some adjustments or use a different master cylinder. To my knowledge, the S10 MC you're probably refering to is a power application (Raybestos MC390257?). I'm swapping from a power brake setup to a manual using a lightweight Mopar master (Raybestos MC39178) with the black plastic reservoir and the twist-off caps (looks much nicer than the yellowy plastic chevy reservoirs), but I had to fab up my own adjustable pushrod.

It has a shallow hole and I need the deep hole but I looked at two of them different part #'s and they both have the shallow hole. Does anyone know if they have a deep hole 88 s10 MC if so anyone know the part #

Thanks