71coupe

I finally got this engine out of my trunk & on a stand. Here are the photos

http://59chevypickup.webs.com/apps/p...lbumid=9459149

So what kind of cam is this? It cam an orange stripe, the #15 stamped into it, a cast "16", a cast diamond, & a cast "GM4"

Thanks!!!

62Jeff

Here are your cam photos.

tach drive 61

nice to see another , this year i found same motor never started at all stock pistons but there was no cam in my motor .forged small journal crank. the 512 blocks will take spin on oil filter, your block has the 10 marking on it as well .mine I balanced it and installed a 151 L79 camshaft ,my motor did not have the high compression pistons , we used 291 double hump heads and it now sits in a 61 vette where did you find your 512 block. mine was from jim glass corvettes,

71coupe

i won it on ebay last week. It just north of boston in a carpet warehouse. He was clearing out his vette stuff...

JohnZ

There should be a 4-digit raised casting number somewhere between the lobes on that cam that will identify it, unless they ground it off when they stamped the "15" on it. Have never seen a GM cam ground and stamped like that one.

INMYBLOOD

John did they make 327 blocks with the 010 and this one even is a 020. I believe high tin/nickel content? I guess what I'm asking is how can you look and tell a 327 from a 350. I know enough about the 350's I've built but never really touched a 327.

JohnZ

Depends when it was cast - what's the casting date on the pass. side rear block flange?

71coupe

On the end of the cam, there's a "38" written in orange with a light blue paint dot



This might be a 153 or 158.
This stamp is opposite the diamond mark





It also has orange stripe on 1 end & yellow or lt green on the other




The only cast # on it is a "16". On either side is a screw head impression. Next to the 16 is a small white paint dot



Thanks

71coupe

More block pics here

http://59chevypickup.webs.com/apps/p...lbumid=9459149

Is has a strange oil filter adapter...no threads

GUSTO14

Actually it's not so strange at all... the threads are inside the block and hold this oil canister. There is a square shaped O-ring that goes in the outer grove that seals the canister to the block.


Good luck... GUSTO

AZDoug

Stuff that cam back in the motor and get a mag base dial indicator and rotate the cam and tell us the lobe lift on intake and exhaust, that should ID the cam pretty accurately.

It is most likely an L46 Hyd cam, but could be something else.

Doug

MikeM

If that is a CE 327 engine, I'd think it would have a L 79 cam in it, not L 82.

71coupe

I measured 0.298" on all of them

tach drive 61

my 512 block came with same oil adapter, take it off and stock gm 350 adapter bolts right in place and allows spin on oil filter , these 512 327 blocks are just like the 350 10 blocks .but 327 bore & pcv breather.nice to see another great deal .

71coupe

thanks man, I did get a killer deal. I just have to change directions on my pickup build because of this 327. I was planning on a 455 Olds, but this engine is almost ready to drop in, plus it will rev a lot higher, hehe. I'll save the 455 for a covertable '68 Cutlass

R1234

My GM "151" cam that I installed in my 327 had the part number stamped on the front end of the camshaft.

AZDoug

That would point to a L-79 Hyd 151 cam (most likely) or 346 mech cam.

What separates them is duration.

At .010" lift (measured at top of a lifter), the duration on the mech cam is .283/.283,

The L79 cam, at .005" lift (at lifter top) is .284/.284".

Those are very close numbers, but since they are measure at different left heights, you should be able to tell them apart, as the L79 cam will have significant shorter duration at .010" lift.

You have to measure off a lifter to use these numbers.

Doug

MikeM

The solid lifter cams for first gen small blocks was ID'd by a blue paint swatch. I don't remember what color the 151 had on it. Besides, they didn't make any CE SB's blocks with solid lifters.

oldskydog

The 010 and 020 have nothing to do with nickle content. They represent the last three digits of the casting number of blocks that use the same front mould pattern.ie, 3970010 and 3970020, both of which are Saginaw castings, the 010 being a 350 and the 020 being the 307 block. Note also the 509 just under the 010 and 020. That refers to the 3951509 which was a Saginaw 400 block using the same front casting pattern.
If you look at the same area on similar vintage Tonawanda small block you should find the numbers 014 for the Tonawanda 3970014 350 block, an 024 for the 3970024 Tonawanda 307, and probably a 511 for the Tonawanda 3951511 400 block.
This myth of the 010/020 meaning "high nickle" block just won't die.

JohnZ

That's correct - that's why I asked for the casting date of that 9512 block; if it was cast after 1968, it would share that front case pattern with the 010 and 020blocks.