Another guess the horsepower to throw in the mix......

[blykins]

https://www.instagram.com/p/B47fVuznvzi/

[frnkeore]

Something that you have to remember, when comparing 2 bbl Vs 4 bbl's, is that the 2 bbl, is rated at 3.0 inches and 4 bbl, at 1.5 inches. When you factor that in, the 500 cfm 2 bbl, carb, only flows 353 cfm.

I'm pleasantly surprised that, that old, well used, work horse, does so well

I'm looking forward to what you do with this engine.

Added:
Has anyone done any actual flow tests on the 500 cfm 2 bbl's? They have the same venturi & throttle bores of the 750 carbs. 1/2 that flow, is 375 cfm.

[Sand hauler]

Very well done,and interesting, makes me wonder about the 352 I have in my front yard,lol

[WerbyFord]

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.

[blykins]

You need to check the dyno results page and also the project thread I have in the projects section of the forum.

I pulled the heads off yesterday.  The bores are standard, with about .005" of ridge.  Pistons are .050" in the hole plus shim gasket. 

The heads are both C6's, there was just so much sludge that it looked like an 8 before LOL

[My427stang]

Werby, I was in the room with that screaming race motor LOL (along with the two of my we spun, you'll see those on the dyno page too)

I would suspect the difference in the 352's RPM peak was due to valve float. Not sure it would have made much more power, but the springs were certainly a mechanical rev limiter