My "Y" didn't work because it kinked the hoses. It was a PITA too so...
Engine back out! Line on left now has connector fitting for easy engine removal. Line on the right will connect to an inline filter as it's going to feed the exhaust.

Made a new fitting for the exhaust mani (copied the idea from a Kawasaki 1100 water fitting). Prepped the ex mani by drilling and retapping the hole from 1/8 to 1/4 NPT.

Screwed in street elbow that I drilled and tapped to change it from a 90 elbow to a tee.

Connected the two inlets with 3/8" id hose with 3/8" barbs. Intake from the pump is a 1/2" barb to match the green 1/2" id hose coming from the bulkhead tubes from the pump.

Bottom of head pipe with filter.

Drilled hull for RRP bilge and pissers from Thrust.

Getting there!