What Cam and Rebuild Parts needed for 583 heads

[Ivars]

I am building a 1964 Impala SS Convertible with Correct 425HP 409 Engine (4-Speed). Block is 3844422, Heads are 3852583, intake is 3814881 and carbs are Carter AFB 3361S and 3804S (option is to replace with 3362S). My question is what CAM to use and what parts do I need to purchase for refurbishing the 583 Heads. I wish to ask the experts here and not rely on the Machine Shop suggestions. Thank you

 

[Skip FIx]

I would for sure not trust the two piece factory valves. One piece stainless valves. Cam choice depnds on how factory original you want to keep the entire motor on the inside as well as outside. Valve spring specs would be somewhat dependent on cam choice and the actual installed height on those valves

 

[Don Jacks]

Get with Show Cars and get the valves,the Isky cam#0958,The lifters and springs and retainers as well as the new valve seals can be had there as well.Do not use the aftermarket stock replacement rocker arms,as they won't hold up for a stock 250 horse 348.

 

[Phil Reed]

The 3804-S carb is correct for 1964!!!!! Post the build dates off your carbs.

 

[64ss409]

Don, Show Cars has the 0958 listed as a Comp cam?

 

[Don Jacks]

You're right,the Isky is 0923.

 

[Ivars]

I plan on getting all parts from Show-Cars HOWEVER
I have another question. I just unpacked the second 583 head. I attach pictures of each. One has GM3, the other has GM1. Can I use both of these heads in my rebuild?

 

[Ivars]

So the ISKY 0923 is correct.

As for the carbs, Pictures are attached. J8B and J8

 

[La Hot Rods]

One looks like it has had some valve guide work done to me.

 

[Ivars]

I am going to have both reworked at the machine shop. Should I be careful about anything????

 

[La Hot Rods]

Do not let them put seats in them.

 

[El Rat]

Why?
Maybe I’m curious because my heads had the exhaust seats replaced (by P.O.) they all checked out perfect and passed the pressure check. The valve job only took minimal clean up.

 

[Ivars]

Mr. Shaker, Why not seats, what is the alternate suggestion. What did you do for your heads?

 

[Ishiftem]

There is very little material in that area and it is very easy to break through or not break through when machining but crack when the seats are driven in. Not that it is impossible to put seats in but it is not recommended either.

 

[La Hot Rods]

If the seats are worn bad, going to a larger diameter valve will move the seat out, then no need to install seats.

 

[Don Jacks]

 

[Ivars]

Thank you gentlemen!!!!!

 

[El Rat]

And that helps with unleaded gas how?

 

[La Hot Rods]

Generally just running a stainless valve will keep from having a problem with the unleaded fuel.
It's not like we are installing these engines back in a grain truck anymore.

 

[Phil Reed]

Your carbs are both Oct. 68 date coded.
Just use them.