Hot Rods Let's talk Cadillac 331's, 365 and 390's

Anybody know the CC’s on an unsurfaced 1960 390 head? Need to know for ordering pistons. Thanks

 

From literature I have taken off the internet the head combustion chamber is stated to be 67-70 cc,.... the volume with piston valve reliefs is stated as being approx 76cc. I can not personally confirm this, hopefully someone can add more precise info

 

Thanks, those are the same numbers I found. I’m going to do an actual CC check on my heads this week and I’ll post my findings

 

Let’s talk timing chains. Anyone know of a double roller or equivalent for a 1950 331 or am I stuck with the stock style repops? Thanks

 

I don't think there is for any of them until you get to the 472/500's.

 

Not that it makes any difference when you allready seem to have found one.
The tiny bit is cut from the new gear shaft from a 331 model, needed it for a 390.

 

For this one!.

 

Nice!

 

60-62 ? , nice intake also.

 

-62

 

Looking for 390 timing chain cover if anyone has one for sale. Want to get rid of the 331 rope seal cover I have. I tried posting in the wanted section of the classifieds with little luck so I figured I post it where all the Cadillac guys are. Thanks

 

There are a couple on Evil-bay now... $70-80 range.

 

Thanks, saw those. thought I would try here first

 

@lumpy 63 you still have that junk 390?

 

Another issue that I’ve noticed is rocker arm wear where it contacts the top of the valve stem. I have a couple sets and most of them are worn like the photo I posted. What’s the solution? Find enough unworn ones? Can they be resurfaced?

 

Call the old guy at Rocker Arms Unlimited. The dude is a wealth of knowledge.
http://www.rockerarms.com/

 

Chris , the only thing I have left is a dampner a valley cover and an oil pump pick up .......

 

My machine shop had a fixture to resurface rocker arms, but if they are really hammered they are probably junk.

 

. I had mine rebuilt by rocker arms unlimited. $350 plus shipping. Came back looking brand new.

 

Is there anything incorrect about how I have my PCV set up? It seems everyone else does this fancier so I was wondering if how I have it is ok.

 

That PCV setup looks good to me as long as you have the breather tube clear to Fresh Air

 

Thank you. When you say "breather tube", you are talking about the oil filler neck? I haven't found a cap small enough to fit so its very open right now.

 

I've seen talk about using a modern harmonic balancer on these Cadillac's, but haven't seen any info about it. So, who has some info about actually doing it? Do you use a SBC balancer? I haven't tried to check any dimensions yet, but I'm going to assemble my engine soon, and I thought it was worth looking into.

 

My belief is they used to cut the crank snout off, drill and thread then weld on the Chev sized snout.

 

I am wondering this myself…

 

That's how Cadillac did them in '62... how I've done it on both of my Cads; seems to work fine.

 

Through the filter media in the oil cap.