Cams and etc.

[bigtruckboi2000]

[quote=bigtruckboi2000;4682372]

Originally Posted by blackedoutharley

Pull a valve cover and get the casting number off the heads and we can then tell what they are. QUOTE]

The casting number off the heads is 14014416.

This is what I found out about my heads-14014416: 305 HO, 80-85, 58cc, 1.84-1.5, 165/59cc ports, 7 bolt ex.
What does that mean?

[Captainfab]

That means that those heads are 4 barrel 305 heads used from 1980-85. You either have a 305 in your truck, or someone put a set of 305 heads on a 350. I think you need to find out what engine you actually have. You need to find the castinf numbers on the back of the block on the drivers side, and the stamped numbers on the pad just in front of the passenger side head.

[quote=bigtruckboi2000;4682401]

Originally Posted by bigtruckboi2000

This is what I found out about my heads-14014416: 305 HO, 80-85, 58cc, 1.84-1.5, 165/59cc ports, 7 bolt ex.
What does that mean?

[bigtruckboi2000]

It's a 350, I checked that a couple weeks ago. I've been role that HO 305 heads in a 350 produces higher compression which I guess is a good thing.
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[Captainfab]

That is true that the 305 heads raise the compression on a 350. But they don't flow enough air to produce good power numbers as compared to a standard small block head.

Originally Posted by bigtruckboi2000

It's a 350, I checked that a couple weeks ago. I've been role that HO 305 heads in a 350 produces higher compression which I guess is a good thing.
Posted via Mobile Device

[bigtruckboi2000]

Originally Posted by rideblue00

I built a 350 with that cam(268H). Had a EDEL 600 and just a performer intake. Flattops below deck and about 8.5 comp ratio. Dynoed at 301 hp and 372 TQ. I liked it. I put a set of mid 70s 882 heads on it. If i would have put a set of Dart iron eagle 64cc heads, i think i could have pulled 325-335HP. I didnt need it tho, 300 was cool for a DD.

I am looking at having a comp cam K kit (dur 268/268, lift .454/.454) part # CCA-K12-210-2 put in my SBC 350 with a GM performance(part # NAL-12558060) 64 cc chamber/170 cc intake heads from summitt racing. Does anybody know if this is a good combo? I am keeping the 3.73 gears and TH400 that is on it now, but wanted to know if those upgrades will help bring out some of the potential in the engine.

[GASoline71]

Those are 305 heads! Ditch them... fast! The higher CR will be negated by the tiny intake and exhaust valves.

Gary

Gary

[bigtruckboi2000]

Originally Posted by GASoline71

Those are 305 heads! Ditch them... fast! The higher CR will be negated by the tiny intake and exhaust valves.

Gary

Gary

Thanks GASoline71, I have 305 heads on it now that I am trying to get rid of!!! What would be some good 350 heads that would match good with the cam kit?

[72 K20]

"People tend to think they need more cam, and usually go bigger than they need to. For a mild small block, the 268 is hard to beat."

I have run this cam with great results !! They are a great mileage cam as well. The 2 motors that I ran the 268 High energy in got great mileage and performed very well.
69 camaro averaged around 22 mpg and an 81 K20 4 speed truck 17-19 mpg,, both 350 cid with headers and Q-jets.
I'm planning on running the 268 in the daily driver that I'll be building this next summer.
Along with a 700R trans and 3:73 gears I think it will make a nice combo !!

[bigtruckboi2000]

72 K20, what kind of heads will you have on it? And what kind did you use previously? As of now I am trying to find out which heads would be a good match. I'm not changing the gears, transmission or carb, but looking at getting a dual plane manifold.

[72 K20]

The heads I plan on running are pretty much a standard 1.94 smogger head,,, pretty much a common head . I am drawing a blank on the casting numbers right now,,maybe 462???,,not sure,, but they are common and easy to find.

The camaro was an otherwise stock '74 350 2 bbl engine. The K20 had basicly the same heads.

On the camaro I ran a torker intake which is a single plane high rise and not the perfect match for the 268 setup but it ran out alright,, it did not like cold weather but I was living in Vegas then and rarely got into cold weather. A good dual plane aluminum high rise intake works great with this cam. Even a stock Qjet intake runs good,, that's what the K20 had.

On the motor I will run in the daily driver I am going to run a 300-36 Holley intake which is supposed to be similar to the original LT1 intake.

[mud.man.rj]

I think that is a 305 head from around 1980-84 so should have a smaller chamber size than the normal 76cc and will give you a bit of a bump in compression which will help with a bit better cam. Not a great flowing head for higher rpm, but doesn't sound like that is important to you.

[Captainfab]

I have to disagree Gary.....those are the ever popluar L31 Vortec 350 heads. IMO that cam and those heads would be a good combination.

Originally Posted by bigtruckboi2000

I am looking at having a comp cam K kit (dur 268/268, lift .454/.454) part # CCA-K12-210-2 put in my SBC 350 with a GM performance(part # NAL-12558060) 64 cc chamber/170 cc intake heads from summitt racing. Does anybody know if this is a good combo? I am keeping the 3.73 gears and TH400 that is on it now, but wanted to know if those upgrades will help bring out some of the potential in the engine.

Originally Posted by GASoline71

Those are 305 heads! Ditch them... fast! The higher CR will be negated by the tiny intake and exhaust valves.

Gary

Gary

[bigtruckboi2000]

Originally Posted by Captainfab

I have to disagree Gary.....those are the ever popluar L31 Vortec 350 heads. IMO that cam and those heads would be a good combination.

If I get the Vortec heads, which manifold would work well with them? I'm asking because I know which cam I'm getting(Comp Cam kit part# CCA-K12-210-2) and I have it narrowed down to a couple of heads I like, which are the Darts (part # DRT 127221) and the Vortec's (part# 12558060). But I also know that if I get the Vortec's I will HAVE to change the manifold so I'm trying to find a good manifold that will work well with the Vortecs.

[GASoline71]

Originally Posted by Captainfab

I have to disagree Gary.....those are the ever popluar L31 Vortec 350 heads. IMO that cam and those heads would be a good combination.

The number I run came up with the 305's...

If they are for sure the 350 Vortecs... by all means, yes use them. Great set of stock heads. Good bang for the buck.

Gary

[Captainfab]

I would go with a Edelbrock Performer, or Performer RPM. I have not used one, but I have heard good reviews on the Summit brand of intakes. They are supposedly made by Holley/Weiand.

Originally Posted by bigtruckboi2000

If I get the Vortec heads, which manifold would work well with them? I'm asking because I know which cam I'm getting(Comp Cam kit part# CCA-K12-210-2) and I have it narrowed down to a couple of heads I like, which are the Darts (part # DRT 127221) and the Vortec's (part# 12558060). But I also know that if I get the Vortec's I will HAVE to change the manifold so I'm trying to find a good manifold that will work well with the Vortecs.

[Captainfab]

What you may have seen, was the 060 which is the last 3 of the casting number for the Vortec 305 heads. The 12558060 is the part number for the L31 Vortec heads.

Originally Posted by GASoline71

The number I run came up with the 305's...

If they are for sure the 350 Vortecs... by all means, yes use them. Great set of stock heads. Good bang for the buck.

Gary

[bigtruckboi2000]

Originally Posted by Captainfab

What you may have seen, was the 060 which is the last 3 of the casting number for the Vortec 305 heads. The 12558060 is the part number for the L31 Vortec heads.

It's the vortec 350 heads for sure, but I'm leaning towards getting the Dart alum heads since everything I've read and heard says there's no difference in power produced from alum v. cast iron heads. But the alum heads are a lot lighter. I'm still going to get a performer manifold to replace the torquer though. So am at Comp Cam kit (part CL12-210-2), Dart alum heads (part # DRT-127221) and a performer manifold (part # EDl 27014). One question I do have is will the higher compression produced by the alum heads have a good or bad effect on engine performance? And am I out to lunch with this combination of parts?

[GASoline71]

More compression = more power. For the most part.

But you'll have to run higher octane fuel.

Gary

[Captainfab]

Those Dart heads have 72cc combustion chambers. These are going to drop your compression a good bit from where you are at now with the 305 heads with the 55cc chambers. It is impossible to tell you just what compression you will have without knowing what pistons are in the engine, the deck height, and the compressed head gasket thickness.

[bigtruckboi2000]

Dag and I thought I was onto something It's going to be a daily driver so it will only be getting regular octane. I'm still learning and I take it that 72cc combustion chambers are to big to benefit me even with the comp cam kit(CL12-210-2). What would be a good fit?

[72 K20]

I have a thought on aluminum heads,,,,,, How many 40 year old aluminum heads do you see compared to iron heads ?
2 different metals,2 different expansion and contraction rates, I'll stick to iron on iron.

My opinion......

[Captainfab]

Does your engine currently run on regular grade gas with those 305 heads? The Dart heads will still be an improvement over the 305 heads. But like I said, it is impossible to make a good recomendation without knowing some specs on the engine. Those 72cc chambers are smaller than the average small block head, but without knowing what pistons you have, you may be better off with heads with 64cc chambers.

Originally Posted by bigtruckboi2000

Dag and I thought I was onto something It's going to be a daily driver so it will only be getting regular octane. I'm still learning and I take it that 72cc combustion chambers are to big to benefit me even with the comp cam kit(CL12-210-2). What would be a good fit?

[bigtruckboi2000]

Originally Posted by Captainfab

Does your engine currently run on regular grade gas with those 305 heads? The Dart heads will still be an improvement over the 305 heads. But like I said, it is impossible to make a good recomendation without knowing some specs on the engine. Those 72cc chambers are smaller than the average small block head, but without knowing what pistons you have, you may be better off with heads with 64cc chambers.

CaptainFab, yes it currently runs on regular octane would like to keep it running on regular pump gas since it will be a daily driver. I wish I could get more specs for you, because you and this site have taught me and helped me tredmendously. But I think I do have a good upgrade combo put together now. Like to hear it? here it goes- Comp Cam kit(part #-K12-210-2, Edlebrock 2716 Performer EPS Manifold(part #-EDL 2716), and GM Performance Vortec Cylinder Heads(part #-NAL 12558060). I'm using Summit Racing site to figure out what I will get but I am still shopping around other sites and places for better deals/prices. And I think I might be a lot closer to having a good set-up unless CaptainFab decides to bust my bubble again . Either way I appreciate all the advice and guidance( it's a lot cheaper this way also). Well the range is open and ready for shots!!!

[Captainfab]

I think that will be a good combination of parts to add to your engine since you don't know the specs of the parts inside.