Camshaft id please...

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360PLUS

360PLUS

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I Have 2 old school camshafts that id like to get specs on if possible

One is a Norris 356 DMS with a 7 on the left and a D on the right



Other is a Crane on the snout is SS-320-NC and rear 975 uc

can any one give specs and if solid lifter or hyd.

thanks in advance

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That Crane SS 320 is going to be a BIG solid flat tappet, unless it's been reground. Probably on the order of 320/330 advertised duration. I had an old SS 310 in a Chevy 396 decades ago. It was 310/320 .600/610 ground on a 108 for comparison. But remember, the big Chevy had 1.73 ratio rockers, so the Mopar small block version will have less lift, but I bet I'm spot on on the duration.
 
It would not be a BIG solid flat tappet.
It's a 1 bolt cam . it specified as hydraulic special 236 244 @.050. Duration
Lift is .486 & .504 with a 1.5 rocker .
This is why the at .050 numbers are the standard because anyone could be fooled by advertised duration numbers which are useless.
My 264-268 @ .050 cam is barely cracking 300 on advertised.
And this one is 236 @.050 with 320 as advertised lol
 
360PLUS said:
I Have 2 old school camshafts that id like to get specs on if possible

One is a Norris 356 DMS with a 7 on the left and a D on the right



Other is a Crane on the snout is SS-320-NC and rear 975 uc

can any one give specs and if solid lifter or hyd.

thanks in advance

View attachment 1716148088

View attachment 1716148089

View attachment 1716148090
Click to expand...

FYI​

Identify Crane Cam SS-320-NC​

I'm not sure if an H would be stamped on your cam to denote Hydraulic

1696110598840.png
 
Last edited:
MOPARMAGA said:
It would not be a BIG solid flat tappet.
It's a 1 bolt cam . it specified as hydraulic special 236 244 @.050. Duration
Lift is .486 & .504 with a 1.5 rocker .
This is why the at .050 numbers are the standard because anyone could be fooled by advertised duration numbers which are useless.
My 264-268 @ .050 cam is barely cracking 300 on advertised.
And this one is 236 @.050 with 320 as advertised lol
Click to expand...
All small block cams are one bolt. The old SS series used advertised duration stamped on the cam. Then later, they changed it to the CC series. I don't know what it was after that. The SS grinds were DECADES ago in the 1970s.
 
Keep in mind, that cam card says SSH. That was the SS hydraulic. Different animal.
 
Is there a difference sateen the SSH & SS cam?
OP said & shown a SS stamp on the cam.
 
RustyRatRod said:
All small block cams are one bolt. The old SS series used advertised duration stamped on the cam. Then later, they changed it to the CC series. I don't know what it was after that. The SS grinds were DECADES ago in the 1970s.
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I guess I forgot about small blocks being 1 bolt only...which I might add is dumb to me
 
rumblefish360 said:
Is there a difference sateen the SSH & SS cam?
OP said & shown a SS stamp on the cam.
Click to expand...
There was back then, yes. I'm not trying to argue, really. I'm just quoting it like I remember. I've run a few of the old SS grinds and they were all solid.
 
MOPARMAGA said:
I guess I forgot about small blocks being 1 bolt only...which I might add is dumb to me
Click to expand...
I agree, but as for the dumb, I see it in the mirror every damned day.
 
@Bighead440 may have some insight. He might even have an old Crane catalog. He's sharp at this kinda stuff.
 
rumblefish360 said:
Sweeeeeeeeeeeeet!!!!!

Hell of a lash though!
Click to expand...

The MoPar PurpleShaft solids are .028/.032" pretty much across the board, I always set mine at .024/.026" HOT and had no problems. Much less noise, and I ran them with 1.6 rockers as well. Play around with it, but unless you are lacking bottom end, tighter will be better up to a point.
 
Bighead440 said:
The MoPar PurpleShaft solids are .028/.032" pretty much across the board, I always set mine at .024/.026" HOT and had no problems. Much less noise, and I ran them with 1.6 rockers as well. Play around with it, but unless you are lacking bottom end, tighter will be better up to a point.
Click to expand...
Chevy was notorious for using lash you could drive a bus through.
 
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