Dick,

I picked up my TF Cessna 310 last night and per your recommendation I asked for (2) OS 50's but the OS 50's are no longer available... it is reported that OS 55's "that the" distance between bottom of engine mounting to the top of the cylinder head causes a cowl interference. I would have thought that these were the same size castings. Did your OS 50's just barely fit?

Thanks

ACP