1955 Cessna 180 Engine Mount Change

[EEindNW]

I have a 1955 180 with the PPonk O-470-50 motor with dual exhaust hanging on the original J mount. I am looking for anyone that has exchanged the J engine mount for the 185 floatplane mount PN 0751003-31 (has the tip out mount brackets on the lower firewall attach points). I have seen this engine mount combination on a 1955 with dual exhaust so I know it will work. My question is what brackets are used on the lower attach points? The "Lug-Engine Mount" PN 0751006-2 called out in the 185 parts manual is to short to fit through the aluminum bushing that go through the firewall. I have already contacted Acorn Welding and Seaplanes West and they have been very helpful but unable to help me. Thank you for any help.
Silver Skywagon

 

[hotrod180]

What case was used on your Ponk engine? The A & J case uses a different "mount leg bracket" (p/n 534470) to attach to the engine mount than does the K engine (p/n 538518 ). My 53 model was upgraded from an A to a K back in 1993, and the earlier mount legs had to be installed on the K engine in order to use the early p/n 0751000 A & J mount.
This isn't what you asked about, but it might be something you need to address.