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512 all the way. This is a very mild combo that gets driven. It still dips into the 10’s with a six pack, mufflers, and drag radials. I’ve never really optimized it 1/4 mile abilities do to the lack of any safety equipment required for the ET it runs. it’s just a street car anyway.. lol.

The stuff we chose to argue about :lol:

I live in Michigan. All my cars always have antifreeze including the race car. I’ve seen to many broken blocks.

Stroker cost the same as a stock stoke engine. I’d do a 4.250 stroke combo with a Chevy rod to keep the internal pickup. Edelbrock heads will be your best bang for the buck. Hemi’s need some compression to run decent so 10.5 range or even a little higher with an aluminum block. If I were to...

If it’s got a stumble it’s probably lean, like mentioned need more info. Only one breather required for a PCV. What’s kind of carb? That’s not a very big cam, although it’s kinda funky. Looks like a thumper type grind (don’t care for those).

That’s the problem with them, the gasket gets sucked into the void on the main body without a backing plate.

4412’s make great center carbs

My 67 post was 3650 with a 440 and glass hood. Roadrunner is 3760 with alum headed big block. They’re not all that light unless you start stripping undercoating and putting them on a diet.

I usually hit it for a minute or so. You’re good to go if you have oil up top!

One put a pressure gauge on it, two you have to rotate the engine to line up the cam/cam bearing holes to get oil up top

If the tune was good and now it’s not something changed I wouldn’t be swapping bleeds as that’s not the issue. Have you verified the 02 sensor is good?

I always solid mount the drivers side, sometimes the passenger side as well if the engine has any power. 512 in my roadrunner is solid mounted, 99% street car. No I’ll effects.

I built the exact same combo for a friend, or there than the intake and carb. I’ll be curious for the dyno results.

Chevelle must be a slouch, it should have beat the hemi given the work done to it. I wouldn’t call it exactly a fair comparison. And a hemi with a Hyd roller isn’t going to do the normal pull to 7k thing and that’s where they really get it done. That being said you gotta drive a stick car. The...

You gotta be kidding, always prime…

damn, no kidding…

You wanna try that set up on Your street car more power to you. It’s a **** setup period. Might go down the drag strip. All it’s doing is trying to compensate for the poor distribution on the intake. I’d concentrate on fixing the intake before I did that to any set of carbs I’ll rank that up...

plugging the kill bleeds is a horrid mod and should never be done. That’s from someone who does not understand the vacuum carbs and how they operate. And there’s no way the small center carb should have that jetting.

for the same reason we don’t all run .509 cams, stock stroke cranks, and 906 heads. Last I checked none of those are broke either but, if it’s gotta be explained then…

https://www.forbbodiesonly.com/moparforum/threads/adding-idle-circuits-to-holley-dc-six-pack.152390/