Mild 383 Cam - Help me choose

The XE274 has specs of 274/286/110/in at 106 for an ICA of 63*. The 050 #s are 230/236, and lift of .520/.523....These then are 44* ramps, so looking good!
This will require a Static CR of 10.3 to net a Dcr of 8.25/165psi
At these numbers your 383 will have a strong bottom end, to use the stock TC and your 3.73s.
If you slap that cam into a 9/1 engine you will likely be very disappointed....the Dcr will be around 7.23/139psi. I think this will barely squawk the 275/60-15s,with your parts.But again, at 30 mph the Rs are 3385 with 3.73s so the stockTC is out of the picture, and the engine is starting to make torque.By 4000 or so the torque should be peaking so by 35mph she is pulling pretty hard.(Of course not as hard as if it had a 10/1 Scr)
The 286* exhaust degrees makes the install flexible, and will help to exhaust in the A-body chassis.I would slam that puppy in there. It is the right cam for street.
But it wants at least 10/1 compression ratio to be strong on the bottom.
The difference between 165 psi and 139psi is very dramatic off the line, and with a stock type TC. I think it would be better if you had a 2800 and 3.23s, than a 2200 and 3.73s......... But no matter, 3.73s are excellent for street.
So the thing to do now is calculate the current compression ratio.
If the engine is in the car there is no good way of doing that, short of pulling a head and measuring it.
Outside of that, you could stab the cam in with just two lifters and do a compression test on that cylinder. I would be looking for 160psi, which is 8.00Dcr on a 10.0 Scr...For me that would be non-negotiable minimum.I would adjust the Scr to get it or live with the bottom end.
But Ima thinking with 3.73s, that engine is gonna spool up a little faster, so say you had at least 150/155psi, I might take a chance. And if you are running 245s It might be good even at the aforementioned 9/1;cuz even a teener can spin those, and if your spinning, the stall don't matter much.