Gary's 2 442-S

Hello everyone

I decided I am going to order a set of the Edlebrock Heads from Summitt Edelbrock 61025 Edelbrock Performer RPM Cylinder Heads | Summit Racing

I am also going to be ordering a set of the Harland Sharp rockers Harland Sharp S5003 Harland Sharp Original Roller Rockers | Summit Racing

My question is which push rods would I need? When i was talking with the Summitt people about the push rods they said I needed a 9.7? This is not the exact lenght they gave me but it was 9.7 something. They recommented a brand of rods by Trick Flow When I called Edlebrock technical support they suggested that I wait until I mount the heads and then measure for the length/ They also said when I asked about the cylinder head bolts they said I could use regular cylinder head bolts which I do have a new set of.

Any suggestions would be much appreciated. I wont be ordering for a couple of more weeks.

Thanks
Gary

fleming442

Yes, measuring the pushrod length would be best.

You can reuse the head bolts, but I prefer ARP (studs).

chadman

You would be better off with the S5016 or S5017 rockers that were designed for an Oldsmobile. You need to measure for proper pushrod length. If it's out in left field it will wear out guides and not give the proper cam lift. Here is a good how to on measuring pushrod length:

cutlassefi

You need washers when using bolts on an aluminum head. Just use the ARP 180-3600 bolt kit.
And don’t believe Summit, they read off of a.screen. Seldom do they have ANY real world knowledge.
The S5003’s aren’t right ones for Edelbrocks. Like Chad said, 5016 or 5017, or the the ones I offer, which are an enhanced Harland sharp.

Gary's 2 442-S

Thanks for your help

Gary's 2 442-S

Thanks Mark

Gary's 2 442-S

Thank you

oldsrush

There is a spec sheet that comes with the Edelbrock heads telling what length pushrods to use but you still need to check the swipe on the tip of valve.

droldsmorland

Examine the heads well when you unwrap them. Inspect everything.
Pay particular attention to the heli coils. Some of the head designs such as the SBC heads have one bolt for the rocker studs that breaks through the intake runner. If the heli coil tails haven't been snapped off guess where they will go once the bolt drives the tail out.

Final quality inspection is lacking.

Also, do the water test on the valves to make sure the seats and valves are okay.

Seems nowa daz we have to do our own final inspections. Good practice to double-check things anyway.

Trust but verify.

fleming442

I wasn't aware the factory bolts didn't have washers. Seems like the torque readings would be skewed without them.

GEARMAN69

Any word on the small block 69 cc version of Gen 2 Edelbrock heads being available Mark ? I still have never seen them on the Edelbrock website Thanks

Still day dream of upgrading my 70 red wagon #s .030" L74 350 turning into a 428 cid with your 4.0 stroker and some 69 cc ported heads on flat tops with a nice tight lash solid roller on a HYD roller cam

cutlassefi

69cc heads with flatops will give you about 11.0:1. Maybe a bit much for the street?

GEARMAN69

Thanks

Yeah it would pushing the limits of 93 , would have to keep it cool. Making it 10.5 on the nose would be fine as well. Thats what I ended up at on my aluminum KRE headed 467 stroker Pontiac in my 63 Catalina so I can have a 93 octane race car previous combo was iron head closer too 11:1
The more realistic thing for my wagon is probably buy the new heads when the come available next year and just take em down to 60cc and just put em on my current good running fresh 350 , already have headers ,

cutlassefi

OR, do a Stroker and just the current “big block” version. With a 10cc dished piston you get 10.0:1.

Fpcopo

What have you done to the rockers you offer Mark, this is the first I’ve heard of them.

Gary's 2 442-S

I received the new edlebrock 61025 yesterday. I am now thinking about changing the intake to the 2151. I cant use a taller intake because my car is the 68 442 with the oai setup. I know my original carburetor is not going to work with it since it has a divorce choke and since I am thinking about changing I want to go with another carburetor. what would you gentlemen suggest I might conside to use?

Thanks in advance

cutlassefi

Cam? Compression? Rear gear? Trans?

cutlassefi

Scalloped/Lightened and ratios printed on them.

Olds64

I merged your threads.

Gary's 2 442-S

https://www.summitracing.com/parts/cca-42-229-4
9;1
3:08
turbo 400

cutlassefi

That’s a small cam for a 455……
I’d get a Quick Fuel SS750. I used to recommend Brawlers but I’ve had to send a few back recently for various issues.
Then buy a wideband O2 and tune it right.

Gary's 2 442-S

Thanks again for your help

CANADIANOLDS

have you got an answer yet on when the heads will be available?

Bernhard

Very informative.
Thanks for posting.

68post

Originally Posted by GEARMAN69
Any word on the small block 69 cc version of Gen 3Edelbrock heads being available Mark ? I still have never seen them on the Edelbrock website Thanks

"No, not till Spring 2024, sorry". - cutlassefi

CANADIANOLDS

thanks, I’ve lost track of how many times the date has changed since the initial statement that they would be out shortly after the May-June 2021 release of the big block heads.

can you update everyone in the spring of 2024 so they can order them?

I have customers who are interested in these…not for small blocks though. low compression big blocks will need these just as much

Lee_A

Gary, did you ever get the pushrods figured out?
If not, let me know and I'll bring over some adjustable pushrods and we can figure out the measurement. I still owe you a favor for giving me that hood years ago :-)

Lee Atkinson

Gary's 2 442-S

Hey Lee great to hear from you. Yes i did get the pushrod length figured out. I still have a few things to get right but this engine really is great. I did go with the Harland Sharp rockers and the Edlebrock 6121 instake and of course the new Edlebrock heads. Also I went with the Quick Fuel 750 SS as Mark suggested I am taking the car to our Friday nite cruise on tomorrow here in Pearland.Here are some pictures of the engine

Gary's 2 442-S

Gary's 2 442-S

Lee_A

Looking good, my friend!

skyhigh

Whats the problem with the carb? I bought the brawler because of how good you said they were, mind you I haven't ran it yet cause the build not done but it's been way longer than a year since I had it and can't send it back lol

cutlassefi

In the last 8-10 months they’ve been very inconsistent. Seems like they’re putting whatever metering blocks they have laying around in them now. Most don’t have the idle restriction drilled like it’s supposed to be, among other things.

skyhigh

Maybe I lucked out with an older one, I was really on the fence between the brawler and the newer designed demon. Im just waiting on the new builder to call me for dyno day, shouldnt be to much longer and I hope I got a decent Brawler lol, we shall see.

cutlassefi

You’ll find out soon enough once you try to tune the part throttle stuff.

oldsrush

Just for everybody's knowledge, I used the S5016 rockers on my new setup with the Edelbrock heads. I used 3/8" pushrods reduced at the ends to 5/16" ball. At full lift the pushrods pinched on the based of the rocker. I had to add clearance for them to work. And the swipe on the tip of the valve was pretty good.

66-3X2 442

Have you seen or have any knowledge on the new Edelbrock carb they came out with. I know they did extensive work with Butler Performance with it.

Andy

A friend of mine just purchased one but no testing done yet. Supposed to be a fantastic carb..who knows until it’s proven. I believe the one he bought is going on a mild build 383 cheby . Will report when it’s running.

6844268

i have the same issue pinching the rocker, mine are comp rockers, same heads and rods, im gonna try and make some clearance today. i really wanted to go with HS rockers but seems i would have the same issue and more money wasted lol

6844268

this is what im going with AVS2 Carburetor #1906 650 CFM With Electric Choke, Satin Finish (Non-EGR)