Wow, well, I missed this one!
Funny about the heads, a 390 of mine had the same setup - one c6ae-r head, the other c8ae-h head. Maybe they were done in the same shop.
Per my specs the TRUCK 352 had 8.4 CR, with .056 deck. I don't know what's different vs the car.
Given that, the torque is what's amazing.
If I run the Gonkulator with an electric water pump, here's what it said, of course these aren't predictions any more doggone it:
Stock 2bbl
Torq 308 at 2400
Powr 208 at 4000
500 Holley 2bbl
Torq 311 at 2600
Powr 232 at 4400
BT intake and 650dp Holley
Torq 323 at 2800 (torq seems low vs 344 dyno?)
Powr 267 at 4800 (peak seems high vs 4250 dyno?)
Brent, do you have the other peak Torq and peak RPM's for TQ and HP?
Just for comparison.
Also, are you going to tear that thing down?
I'd be curious how it comes out in there - is it already 30-over, deck clearance, gasket thickness, etc, which cam was in it?
My guess is indeed it should have the 186-186 .401 .401 lift csm.
The 67-up 192-199 cam usually adds about 10hp on a 390-4v or 410-4v but on this little dog it doesn't seem to care.
EXCELLENT dyno of an old factory dog. We had one of these in our old "up at the woods" truck.