The booster made a huge difference on my 4wheel drums. I think it is a must do mod mostly because it is so easy and fairly cheap to do. You can use your manual master cylinder and prop valve. If you have any questions on the particulars you can pm me and I'll help all I can.
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70 GMC SWB Stepside project " Green Booger" soon to be 6.0l/4l80e
93 S-10 "Poppaw's Truck"
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