Jim,
I have the EI FT-60 Red Cube too but my engine (TMX-IO360-M1B) sounds like it has a different configuration to your's. My fuel servo-to-distributor hose, that I need to interrupt to install the cube, is at the front of my engine.
I too have spoken to EI as I could not comply with the install instructions that came with my AF-3500, specifically the 5 inches of straight flexihose in and out of the cube. EI Support advised that is was acceptable to have angled fitting on the cube. Straight in is best but 45 in, 45 out would be better than straight in, 90 out. Never the less, I think I'm going to have to go straight in, 90 out.
The reason for mentioning this is that the AN816-4-4 (straight) and AN822-4-4 (90 degree) both provide for 1/4 NPT-to-1/4 flared tube fitting. However, if you need to use a 45 degree fitting it appears that there is no such thing as an AN823-4-4 (from AircraftSpruce anyway) so you WOULD need a 1/4-to-1/8 NPT reducer to use with an AN823-4.
Whether this info is of any use to you I don't know but figured it worth posting what I found out in case it helps any others in the future.
Steve