Frank, Goodyear brakes with good brake pads should hold during a full-power runup - mine did. I've been told the Goodyear brakes should be able to skid the tires though I couldn't, using my brake handle (rudder pedal kit adaptation).
[Side note: be absolutely sure there's no gravel under your prop during any stationary, full power runup - even gravel underneath the grass. Ed, who found out the hard way.) You should be able to get new brake pads and get WAY better brake hold than you have now. My pet peeve with Goodyear brakes concerns the clips that hold the disk in position. Occasionally, one of those spring clips will fail. Most of the time, I've been told, the brake disk comes loose and gets crooked, jamming and locking the wheel. When my Goodyear clip failed before mid-field, it sprung some other clips and the disk just floated freely. As both brakes use the same master cylinder, I lost braking on both sides and was coasting down the smooth, cement runway at about 35-40 mph, not losing any speed. I was still going 20-25 mph at the far end, heading for the fence. I tried doing a J turn to stay away from the fence. The J turn was successful, leaving me going back up the field, in the weeds, beside the runway. Fortunately, the shallow drainage ditch was smooth at the bottom and the nose gear managed to roll both into and back out of it without collapsing. In the end, it was a fairly low cost repair, once we found a mechanic who understood those $...@%# clips and had a stash of them. It might prevent failures if you replace 60+ year old clips with brand new ones. I don't know. Summary: You should be able to repair your Goodyear brakes and get very good effectiveness out of them for days or years to come till the $#%@ clips fail - if they ever fail. Your choice. Ed
