Paul,
pic #1 alternator mounting.Does your 4130 alt. brkt.plan utilize only one of two lower alt. mounting flanges or both.It appears your diagram only uses the flange closest to belts.
Pic#3 shows 1 of 2 H2O rad's and oil cooler front and center.
Pic #7 is pilot side {side view} of lower H2O Rad.
All heat exchangers are venting into engine compartment.I would like to install a 13" spinner and relocate oil cooler or cut new fresh air intake below spinner in lower cowl.Your advise would be greatly apprec.

It uses two. I just did not show it.
The largest problem I see right off the bat is the cooling ducts must
be sealed to the cowl front openings for starters. Figure out some other place
to pickup combustion air. The left opening must be sealed off completely
as that is pressurizing the entire cowl eliminating all air flow through
the heat exchangers.

Paul Lamar