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No. New(er) rings, but original pistons. With 452 stock heads. (Some mild porting) Only a small uptick to purple grind cam. Performer RPM intake. Holley 750 carb. Stock HP exhaust. If I was to guess? Near 400 crank HP.

I run 91 non oxy in a stock compression '68 440 block. It's about $.30/gal more expensive than 93 octane at 10% ethanol. Performance is same. Maybe a little better economy with the non oxy. But feel better running less/non ethanol on older components. For me? Better peace of mind is worth $.30...

If I ran across a 6 pack setup in decent condition for $800? I would put on my non numbers matching '69 GTX. Even though no 6-barrel option was available. Just the cool factor alone for a street 440. And of course I would make up some story to my Chevy gang. "Its a top secret build from...

Also. It appears to me there is a correlation between carb/intake and head flow? And the appears to be 3:1. (At a minimum.) Meaning if your heads bench flow let's say 380 CFMs on the intake side? X3+ is needed on carb/intake. Thus about 1050 cfm carb is required at a minimum. Being that 440 iron...

I run a Holley 750 on mild 440 build. The carb is older manual choke. The older edelbrock dual plane edelbrock performer doesn't have a vacuum port. Thus just kept manual. Runs very we for overall street performance. Car is 4-speed with Dana 3.54:1 Rear. The car is running 28" taller tire on 15"...

The rule of thumb for street performance is the smallest carburetor that provides the CFM the engine and build requires. Primarily due to better throttle response. Thus for a stock (or very near stock) 440 HP? A 750 I believe is the manufacturer recommendation. I run a 750 Holley with very good...

Is your filler cap vented? The next generation that goes to a fuel neck behind license is even in worse shape with this issue. Obviously can't use a vented cap if tank is over 1/2 full. And you accelerate? Fuel will leak from behind license plate. At least with '69. There is a trunk relief hose...

My girl at the pump. Saying "You know where I like it" (Ok, that came out wrong)

Ok. It's a little bit of that. Lol.

Did your fuel economy go down as you were laying a wet trail behind you? Lol. Been there. Done that.

Good point.

I wouldn't with my '69 GTX. But saying that? Fuel behind the license plate is a bonehead design? Yes, you gain some trunk space. And keep the body lines cleaner. But it causes leaking/venting issues over time? As well as a more dangerous placement for fire.

Yes. Looks to be 383 just eyeballing. Newer air cleaner?

That's for sure. And I was thinking that carb and intake is unlikely from a 4.3? Definitely ID parts starting with engine. Something certainly isn't right.

This certainly sounds like too much carb and intake for the build. It wouldn't surprise me if you evaluate the plugs? It will look and very possibly running lean. Especially if vacuum secondaries? So what to do? I would go back to a 2 barrel setup. There are performance options even with 2...

I just looked at a project car for purchase. '67 Belvedere. 511 stroker. TF heads on pump gas. From a single 950 HP carb. 686 HP at 6200 RPM. Motor only has dyno pull. We quick vid below.

I have a 1050 HP metered for E-85 on a more aggressive build 451. I too believe a little big. My 850 DP on race gas works as well. (I know E-85 to Race gas is not apples to apples.) Car runs very close to same E.T. A little higher MPH with the bigger carb. This was predicted. Smaller carb a...

According to Holley selector? https://www.holley.com/retailer/carbselector/ Holley classic HP 950. 0-80496-1 Assuming mechanical secondaries and no choke.

I once had the opportunity to replace my 850 DP on built up 451 with a dominator 1050. Car ran same E.T. I picked up slightly on the big end. Lost a little on the 60'. Just as we predicted. But the big Dom seemed to use more fuel for nothing? And that's a 4150 vs 4500? We wanted to see if the...

I think this is spot on. Typically one wants to use the smallest carb that can provide the needed CFM at WOT. They typically are quicker responding. Tend to start faster. Bigger carbs also seem to be less forgiving? When driving conditions change? Most all of us can get a carb to tune nice in...