Here's a list of aircraft that used the Wright R-3350
a.. Beechcraft XA-38 Grizzly
b.. Boeing B-29 Superfortress
c.. Boeing C-97 Stratofreighter
d.. Boeing XPBB Sea Ranger
e.. Canadair CL-28 Canada
f.. Consolidated B-32 Dominator
g.. Curtiss F14C
h.. Curtiss XP-62
i.. Douglas A-1 Skyraider
j.. Douglas BTD Destroyer
k.. Douglas DC-7
l.. Douglas XB-31
m.. Fairchild C-119 Flying Boxcar
n.. Fairchild AC-119
o.. Lockheed Constellation
p.. Lockheed P-2 Neptune
q.. Lockheed XB-30
r.. Martin JRM Mars
s.. Martin B-33 Super Marauder
t.. Martin P5M Marlin
u.. Stroukoff YC-134
Also search for aircraft mounted with the Wright R-2600, the PW R-4360, PW
Twin Wasp and Twin Wasp Junior.

Firebombers and freighters come to mind.

Jim