Hey, you are very welcome. It's looking good and I'll bet that you are excited to do your test run!
It looks to me that the transom shield pick up tube is correct, and that possibly the OEM suction hose has been shortened by someone. Can you re-route it and gain any length????
FYI: this is a chromed copper tube, and is very soft. You must be very careful when trying to remove one from a transom shield. It's very easy to bend and expand the outboard end. If at all corroded, it must be done very carefully and gently.
As for a prop, may I assume that you changed out the lower unit to the 1.61:1 ratio, and that re-shimming was done????
You'll just need to try several and obtain your WOT RPM. For this engine, I believe that WOT RPM is 4.2k to 4.6k rpm.
If you can reach that RPM during your WOT test, then you will be propped within the correct range.
You should be able to cruise at about 3.6k rpm or so.
Your riser to Y-pipe couplers are too short, as the OEM always are.
When too short, one of the double band clamps will squeeze the rubber coupler into the scalloped area of the riser outlet.
When this occurs, it will eventually restrict exhaust water flow into the exhaust system.
I'd replace both with a 95mm Marine soft wall wet exhaust hose, and of about 2" longer than the OEM length.
This will get the hose further up the riser allowing the clamps to also be further up and away from the scalloped areas.
I'd also re-route the shift cable sheathe getting it further from the steering system and giving the cable a more relaxed bend.
As the drive articulates and tilts up, the cable will travel some within the sheathe.
As you know, this is a wet cable, so the inboard-most end of the sheathe must be well above the water line.
The temp sensor and choke element wires could to be further away from the intake manifold exhaust cross-over area. This can get pretty dog gone hot here.
Lastly, what's going on with the throttle cable? Looks like it's either been melted or clamped severely in one area.
If memory serves me, the V-8 throttle cable direction will be opposite from that of the OHC 4 cylinder throttle cable operation.
IOW, the cable must now "pull" for open throttle.
Also, the barrel fitting at the end will be removed for the Q-jet throttle attachment.