There is a guy that comes to our warbird every year with a racing T-6. Orange and checker board scheme with a G-62 I believe. He uses 1/4-20 nylon bolts to hold his retracts in. I've been watching this plane fly for many years. Some of the jet guys told me about break away plates used on jets that preserve the wing mount but sacrifice the the break away plate in the event of a bad landing. Been thinking about that for my TF giant P-47 build. I use nylon bolts on my fixed gear planes also.
Edwin