For what its worth..
I have a 76 truck engine 360 in my 74 Challenger.
It was built by an performance engine shop for someone else. I do not know the heads, but, the builder told me they were ported and polished, and that he replaced the pistons with .030 overs built to deliver a "true" 9.5 compression ratio. Sounds low, but then I know that my stock 383 4V in my Charger was advertised by Chrysler as being 10.0 and if you do the math you will get 10.0...Until you factor in a normal head gasket... and then it drops to about a true 9.0. So 9.5 sounds good (was told any higher and would have trouble with pump gas pinging.
In it is a Mopar purple 508 camshaft. That has 292 advertised duration, and 248 at 050 lift. Intake and exhaust. IT IS TOO HOT... Idle is very rough and have to run around 18-20 degrees static advance. It would like MORE...but then starts to "back lash" when starting at 20 degrees. So I keep it at about 18... had to put in a mechanical advance limiter to keep total to between 34-36 degrees. Also, at 1,000 rpm idle, the vacuum is only around 5" which means that its barely, barely enough to run the vacuum power brakes.
Intake manifold is Edlebrock RPM Air Gap and Edlebrock 1405 600 cfm. Was told by the Holley lovers that its "garbage" because there is no tuning on the idle jets... That a Holley would help.. HMMMM
I have on it the Patriot Long tube Ceramic Headers purchased from Summit. They went in easy...... cause a tightness around cyl 5 and 7 for the plugs.. but its ok.. and look good.... Running 2 /14 pipes behind the collector. Only thing I don't like about them, is that they sit to close to the drivers side engine mount, so that I cant get the bolt out to replace mount, without removing the header on that side. Otherwise, its great, can take on and off the mini starter without any problem.. Oh and their inexpensive..
It runs STRONG... I have the 904 torqueflite, with a 2500 RPM stall converter. Even with 2.76 open differential, I cant stand on it from rest without breaking the tires loose...I have 235X60X14 Tires... Couple of quick tests shows 0-60 times of around 5.5 seconds... I have a 3.23 sure grip to drop in soon cant wait... Wish I had your 3.71's and the 518 overdrive...