Thanks for all the advice so far on my other posts I found a set of heads and can now pick a cam but its like trying to pick a candy bar there are so many different options the motor is a 350 bored 40 over has flat top pistons heads are 062 headers are shorty intake is eps performer and carb is edelbrock 650 I am going to be using the car as a street car no tracks I would like to have a distinct exhaust note but would also like to pick something that is going to add a good amount of torque I was looking at the howards 112141-08 I have a basic understanding of the nomenclature on a cam and what everything means just looking for advice from a experienced group thanks for all the help this far really appreciate it

 

You will find your cam choice works best with a high stall and gears.

 

There are more than a few folks here who can offer an educated opinion on what might work but there's lot of information lacking.
Stuff like your calculated compression ratio or the assembly of parts so one can be worked out.
Are the 062 heads stock? As in springs and studs?
As suggested by F-Bird, the cam you've listed is going to need a compliment of parts and engine spec to make it work. What's the rest of your driveline consist of? Something a little shorter than the Howards might give more the results you're looking for depending on the platform it's gong in to.

 

That cam is huge. Stay under 225@.050 and 275 advertised duration and you'll be much happier. 110 or 112 lobe centers too.

 

I wouldn't run that cam on ANY head that came in a factory production car. Thats way too much duration for a street car that is never intended to see the track. **** poor street manners and no factory cast head is going to support the flow requirements or engine speed you'll need to spin it without port work. Port work that will quickly eat away at the $$$ you saved by not buying a much better set of heads to begin with.

You will not be happy with that cam in a street car at street speeds. Poor idle/drivability at low engine speeds 0-2500rpm. Power will come on, but only once past 3500rpm. And a poor flowing head will restrict the power significantly past 4000rpm. Even though Vortec's are pretty good in terms of factory flow, that's still far & away from what a cam like that wants.

That much duration in a 350 means the engine is going to produce peak torque near 5000rpm, and peak power at about 6500rpm, while still making power up near 7000rpm if the heads can support it. What it won't do is make good usable power below 2500rpm. It'll be dog slow.

Honestly, if the car is a street car I'd keep the intake duration below 220* and stick with a wider LSA like 112-116* @.050". Much happier, good idle/vacuum at low engine speeds. And should still make good power and shouldn't fall off till past 5500rpm.

 

I had landed on that cam because I was in a conversation with a guy and that is what he suggested to me again my knowledge on cams is limited and I have been researching it to the ends of the internet lots and lots of info on this topic so much that it makes it somewhat difficult to come to a finial decision I should have said I am running a 5 speed manual in the original posting the 062 heads are stock all I did was sand blast them and paint them to match the motor color other than that it is a stock set of heads the block from what I can find with casting numbers was a l48 bored 40 over flat top pistons I wish I could tell you I know the CR but I don't the heads are 68cc if that helps at all the gear ratio I am also unsure of but can look if its something I need to do I know the car is a 84 firebird came with a v6 in it I will take the advice you all have given me here and steer away from that howards cam on that note would anyone who is better educated on this topic want to toss in a cam suggestion I have been told to stay away from thumper cams for whatever reason. Again thank you all for the help sorry if any of the stuff I'm asking is basic knowledge I will get there eventually if there are any specs you would like me to provide please just let me know what you would need

 

For a nice, mostly street build, the Summit Racing's K 1103 is a nice kit. Also, make sure you check the Retainer to Guide clearance on the valves. Should work well with a duel plane intake and smallish carb. And it's cheaper than the Howards cam.

 

I ran a 0.030" over 350 with about 10:1 compresssion, edelbrock performer rpm air gap intake, 750 edelbrock carb, and comp cams XE274H-10 cam in my 1985 Camaro with a T5. On a engine dyno it made 386 HP, i can't recall at what RPM. With a T5 transmission it ran and drove fantastic.

Your edelbrock eps performer intake tops out at 5500 rpm.

I would think 1 or 2 steps down in cam series to the XE262H-10 would be a good choice to work with what you have.

In fact here is a Comp Cams dyno test with that cam and your intake. It uses Darts heads but the 062 vortecs would be just as good.

https://www.compcams.com/xe262h

 

It's tough to spec a cam based on so many assumptions.
But given what you've provided, let's say this. Your stock 062 Vortec heads are lift limited. .450" is about it. If they have the factory springs then you're limited again. Flat tappet narrows it down even more. Unless you've got a roller conversion.
Hold that thought.
Then there's the matter of the CR. Rough estimates might be based on the flat top piston at 5 to 7cc and the piston below deck an average factory distance of .030". You say the heads are 68cc? That's a little outside the 062 spec of 64cc. Which may measure 66cc. Not sure about about 68. The head gasket is another variable. Any guess there?
With all of the above, you could be anywhere from 9:1 with a 68cc head and a .040" gasket (guessing at the deck height and piston volume but saying average) to almost 10:1 with a 64cc head chamber and thinner .026" gasket.
Having said all of that, I can offer an example from one of my 1st Vortec headed builds. Out of the box heads. 350 flat top piston with .030" deck. .026" gasket. Flat tappet cam. CR worked out to about 9.5-9.75:1.
Comp Cams good old 268H did the job. Single pattern 268 advertised. 218 @ .050". Ground on a 110 LSA.

https://www.summitracing.com/parts/c...make/chevrolet

Fun car. Would light the tires easily. Very drivable. Sounded pretty good too through the single 3". Stockish convertor. Think it started with a open 3.23 rear gear then morphed into a 3.70 posi (which really woke it up).
I'd think about looking for a modern equivalent of that.
If you can zero in on your actual engine measurements, you may consider sending off a couple of cam request forms form the likes of Comp or Lunati. The more specialized guys like Jones Cams might be worth pursuing but you have to have those details.

 

Consider these 2 Howards cams
#110991-08 and #110951-08
And this Isky cam #201271

And Comp cams #12-310-4 #12-316-4 #12-319-4

Use a 015":shim head gasket..
Retainer to VG boss seal clearance must be checked
on all stock vortecs. May need the "ghetto grind"
The stock vortec head valve springs will not work.

 

I like those cam choices. I think almost any of them would be a good fit with the Vortecs. Especially if the OP ends up with decent gearing and transmission.
Comparing the overlap, very similar to the XR276HR at or around 54° and that was easy to tune.
Something about the ghetto grind just kind of bugs me. I've used Comps 26918 springs as drop ins. Takes care of the spring needs and gives clearance to the guides. LS6 springs too I believe. I do like cutting the guides for Viton seals but guys get by without. Just check your clearances like you say.
What's the success rate on the shim gaskets and head and deck surfaces of unknown condition? I can't imagine any machine work (for the PO) is in the cards at this point but it's something I'm considering myself with used parts.

Edit to the OP: You still owe it to yourself to get as much info about what you've got as you can.

 

Never had any problems with sbc or bbc steel shim head gaskets even on 12.5:1 compression..
The head gasket either seals up or it don't..
I like to use the gmpp head bolts with smaller hex.
Can re torque bolts without removing rockers.

 

That's the thing. The "it don't" part is what would keep me from using them on unprepped surfaces. Or at least on my well worn block although the heads are probably ok. Still a risk considering the Victor Reinz/Cometic/Mahle/Corteco 5746 gaskets have never failed. That's .011" in the difference. Can't say I would risk it over that. Pulling the heads for a head gasket doesn't jive with my hobbyist approach!!

 

Unfounded, emotion based fears. If there was a problem with this people would be reporting sbout it.
They are not. The minor ghetto grind on the vortec retainer for extra lift clearance and the felpro steel .015" shim head gaskets are not causing issues at all. If either were, we'd know about it.

 

Emotion based fears?