283 carb choice.

[geezer#99]

Always worth changing!
For the experience and the knowledge you’ll gain.
Otherwise why even gather parts like you did.
Swapping parts always requires more new tools too.
That’s a plus.

[AcampoDave]

I have two 283's. One is bone stock except for an HEI and dual exhaust. The other has been decently warmed up. My personal feeling about my stocker is that I'm not going to modify it because it actually scoots along pretty good. I took the time to really dial in my timing curve and use a column shift 3 speed tranny with a gear spread that really jives well with my rear end gears. My second reason is I love the stock look for the truck it resides in.
I have placed the cast stock iron manifold next to an Edelbrock Performer and the port sizes were clearly smaller. My stock motor does have "Power Pack" heads and the ports on them are clearly larger than the OEM manifold, looking similar to the Edelbrock ports. I figure the heads would mate up well with the larger manifold but can the small stock motor, with the stock little cam even suck enough wind to make it worth it? Would it loose the off idle "pep" that I enjoy in traffic? If you try it, I'd like to know the answer.
Edit: i do know that using an Edelbrock 500 cfm carb with a Performer EPS manifold works great in a sixty over 283 (makes it a 292) with an RV cam and ported and polished 305 H.O. heads.... it will walk away from the stocker, but it's not like a 350. You build a 283 because you want a 283.

[AcampoDave]

Hey Marty....i re-read your 1st post and noticed it's a c3bx and not a performer. I googled it up and found a few threads where they say the rear runner lacks sufficient clearance for an HEI. Don't know if you were awareor if you care, but just FYI

[Marty68]

Originally Posted by geezer#99

Always worth changing!
For the experience and the knowledge you’ll gain.
Otherwise why even gather parts like you did.
Swapping parts always requires more new tools too.
That’s a plus.

love LOVE your sentiment... bough cheap torque wrench

[Marty68]

Originally Posted by AcampoDave

Hey Marty....i re-read your 1st post and noticed it's a c3bx and not a performer. I googled it up and found a few threads where they say the rear runner lacks sufficient clearance for an HEI. Don't know if you were awareor if you care, but just FYI

yes. I probably read the same one... seems SOME will work. I plan on using original points dist. not excited about aftermarket small cap what parts to use to repair? what cap...
those questions make me uneasy.
I may try newer stock hei. but I am 60% sure I do not have firewall clearance

[Marty68]

Originally Posted by AcampoDave

I have two 283's. One is bone stock except for an HEI and dual exhaust. The other has been decently warmed up. My personal feeling about my stocker is that I'm not going to modify it because it actually scoots along pretty good. I took the time to really dial in my timing curve and use a column shift 3 speed tranny with a gear spread that really jives well with my rear end gears. My second reason is I love the stock look for the truck it resides in.
I have placed the cast stock iron manifold next to an Edelbrock Performer and the port sizes were clearly smaller. My stock motor does have "Power Pack" heads and the ports on them are clearly larger than the OEM manifold, looking similar to the Edelbrock ports. I figure the heads would mate up well with the larger manifold but can the small stock motor, with the stock little cam even suck enough wind to make it worth it? Would it loose the off idle "pep" that I enjoy in traffic? If you try it, I'd like to know the answer.
Edit: i do know that using an Edelbrock 500 cfm carb with a Performer EPS manifold works great in a sixty over 283 (makes it a 292) with an RV cam and ported and polished 305 H.O. heads.... it will walk away from the stocker, but it's not like a 350. You build a 283 because you want a 283.

mine has the power pak heads also. I will keep the script covers. and want to find 4bbl base for original air cleaner

[geezer#99]

4 bbl base for original air cleaner won’t fit an eddy carb.
It’s too small.

[Marty68]

Originally Posted by geezer#99

4 bbl base for original air cleaner won’t fit an eddy carb.
It’s too small.

Ugh...

[Marty68]

Looks as if runners in stock manifold are SMALLER. than the heads. Basic measurement shows new manifold matches heads good. While it is apart I stripped the paint off of the script valve covers and painted them. spi. Epoxy. Color and clear.. too nice for a 70 or old truck. ... getting fuel line parts tue am.

[AcampoDave]

Yep, just like mine. I've read before that a smaller manifold on larger heads is fine, but larger manifold on smaller heads creates turbulent airflow bcause of the air dam effect. Seems logical of course. Glad the Eddy will mate up well for you. Please keep us posted, especially with regard to the "test drive"

[Marty68]

Originally Posted by AcampoDave

Yep, just like mine. I've read before that a smaller manifold on larger heads is fine, but larger manifold on smaller heads creates turbulent airflow bcause of the air dam effect. Seems logical of course. Glad the Eddy will mate up well for you. Please keep us posted, especially with regard to the "test drive"

Will do. It may be assembled today.

[Marty68]

Assembled.... need vac line for distributor... and fire it up. ..
Tomorrow...
I will use this electric choke..
Research it's set up tomorrow.

[Marty68]

Assembled.... need vac line for distributor... and fire it up. ..
Tomorrow...
I will use this electric choke..
Research it's set up tomorrow.

[AcampoDave]

So, which carb did you ultimately use?

[Marty68]

I traded 1405 for a 1404. 500 cfm. Not a hot rod. Likely will only see 5k just before it expires. Goal is drive it today.

[geezer#99]

I’ve never seen a 1404 with electric choke.
You sure it’s not a 1403.
I see you have the breather tube.
You got a breather on it?
You still have the road draft tube?

[Marty68]

He converted 1404 to electric choke. Yes oil fill tube has breather. Road tube on back of block. I put a longer hose on it... so it draws from under truck instead of in front of stomp starter hole.

[geezer#99]

The road draft tube needs the slash cut on the bottom of the tube/hose to work correctly.

[Marty68]

I did not know this.
It probably has to be a certain length also. I just took a "swag". now the end rests just above centerline of bell housing, on the right side.
As I was warming the truck up I could see steam coming out of.
As I was cruising down the road with the windows open the levitating battery cover directed the sweet smell of burning oil to be deflected towards my face.

[geezer#99]

You can replace the road draft tube with a cap and pcv like on this 327.
https://www.corvetteforum.com/forums...327-350-a.html

[MiraclePieCo]

Marty, you're keeping us in suspense! How did it run after the carb swap?

[sweetk30]

Originally Posted by geezer#99

Why?
A 600 will work fine.
You got two, use one.

500 and 600 have same primary and secondary sizes.
600 is jetted bigger.
Info here.

https://www.forabodiesonly.com/mopar...-sizes.285890/

there info is a bit WRONG .

i just had both brand new a 1404 500cfm and a 1405 600cfm both mech choke and the primary booster body is much fatter on the 1404 500cfm to choke down the air feed to the butter fly plates . the rest of the info is prob correct but this is a point to understand in the carb info they left out . someone did post it in the #4 reply tho . so if you only read the main post on top you will miss it .

[AcampoDave]

Good info right there^^^. I always kind of wondered how in the heck they were smaller when the bores always looked the same.

[Marty68]

sorry for lack of replies. the carb works GREAT. no i can not use an HEI but that is because the engine is a bit too far back. i struggles getting the distributor back in i had it 180 out twice. a friend came over we set iming and carb by vacuume. it runs fantastic. FANTASTIC. i have a few things on the truck to sort out. it likely will get a wiring harness this winter.
i found an old crusty velocity stack to use for the air cleaner.
the weld broke on the assumed aftermarket alternator bracket flopping it over onto the exhaust manifold. at that very same time the solenoid on the starter became stuck.. so
i did get suckered by my family into buying a 54 150 2dr sedan that Dad painted in 84. basically off the road since 78.

[72blue]

Love the stack!