ok, without more info, it is impossible to suggest a cam.
ENGINE
We have no idea what your engine is . 363 could be a Windsor or a Cleveland.
DYNO
If you have the heads below, there ain't no way your engine makes that much hp.
Was this on an engine dyno or a rear wheel dyno?
CYLINDER HEADS
We have no idea what your cylinder heads are . Dart does not make a "BOSS 302 head, therefore, if your head is from Dart, and it is cast iron and not aluminum, it is a total pile of crap for a $15,000.00 engine and you will get probably 60 more hp by simply bolting on some AFR 195's and it will haul ass.
http://www.dartheads.com/products/aitdownloadablefiles/download/aitfile/aitfile_id/74/EXHAUST
We have no idea what size your headers or tail pipes are . The dyno sheet says 1.75" pipes . You need to measure the diameter of your tail pipes . If they are 1.75", they are incapable of making the power numbers the dyno sheet says.
CAM
You do have the Snausage 290R cam . They make one for the Windsors and one for the Clevelands . Both are the same solid rollers and the same spec but are designed to fit two different styles of engines.
If you have the heads mentioned above, that cam is around the biggest I would can run because those heads don't flow nearly enough to use a bigger cam with.
Also, I would NOT even use that cam if you have those heads because of the incredibly bad exhaust to intake flow ratio . I would use a dual pattern cam.
GEAR RATIO
Block the front wheels.
Jack the rear up by the center of the diff.
Rotate a tire and see if the other tire turns in the SAME direction.
If both tires turn in the same direction, turn a tire until the valve stem is exactly at hr bottom.
Put a dot on the side of the drive shaft near the u joint.
Count how many times the drive shaft turns as you turn the tire exactly on full revolution.
It will most likely not turn an even number of turns . It may turn 3 1/4 turns [3.25 ratio] or 3 1/2 turns [3.50 ratio] or 3 3/4 [3.73 ratio] or almost 4 turns [3.91 ratio].