[442time]

Hi Guys I am new to building motors and I am asking for a bit of help locating answers.

(lane 1) I have the chance to grab a set of camel back heads I was wondering.

What years had these heads been made?
What casting numbers to look for?
What to look for when I do see them?
What ones should I pass on if I happen to find them?
What year is considered to be a golden find?

(lane 2) I just picked up a 350 SBC 4 bolt main I have a few questions about.

Front of the block timing area above the crank
What does the 010 to the left (PS) and the G18 to the right (DS) mean?

Back of the block bell housing Pass side again I see the 010 cast also.
What does the casting H24 and the WR just under it Mean?

The block casting # 3970010
above that casting # it reads 41GM whats that mean?
How will I know what year it is?

The stampings on the block from what I can see they read.
V021 CTR how do I know what that is?

Just under that there is a number that reads.
C8F407435 Whats that?

I think that does it I have just one more question.

Would the camel back heads and block make a good combonation?

Thanks in advance
Steve

[Jmark]

Camel Hump heads, or also called Double Hump heads were great 35 years ago. Save a few more bucks and go with something newer and better. Most of the aftermarket heads are light years ahead now.

The block needs to be checked by a machine shop for cracks and excessive core shift before you buy it. If its been bored before, how much?

The 010 under the timing area refers to the %content of Nickel ( I believe anyway). Thats a good thing.

As far as the rest of the numbers, I don't have a clue.

Boils down to finding a good rebuildable block and work with a good reputable machine shop on what to do and not break your bank.

Mark

[DoubleVision]

From what I found, the CTR suffix code says this block is from a 1970 LT -1. if this is a true LT- 1 then it would be worth considerable money to a collector.

[GearHead69]

When I'm looking for double hump heads I usually glance at the last three numbers on the castings like "461x" "461" "462" "492" I would say the worst double hump head is the 3782461. If you find a X head.. 3782461X that's a very good head and good to look for, they are very rare and you probably won't find a set for under $300. The casting # 3991492 or just "492" is what I run on my 13:1 355 roller motor they are IMO the best head GM ever made. Myn are the over the counter version with small chamber appx 61cc with screw in studs, accessory holes and angled plugs. There are only a few diferent double hump castings so it's not that hard to get confused. I am 15 and I have build 3 SBC engines by myself in my life. I hang out with guys who run 8's and they teach me tricks and tips one guy let me drive his '67 Chevelle with a 14.5:1 434 Small block extremely fast car, it scared the hell out of me when I hit the gas and shifted and seconds later we were going 120.. Anyway I learned to port heads by these guys, I have many hours in my heads porting them I cut the pockets to 1.550 they have Canfield 750 lift roller springs Elgin race Flo valves 2.02/ 1.60's In 28" of water they flowed 273cfm on the intake and 192cfm exhaust @.600 lift. That shows what double hump heads are capable of with some good porting. I paid 100 for the heads bare.. I ported them myself.. valves were like $80, I bought the springs, titanium retainers and 10deg Super Locks for $50. borrowed a seat cutter from my local machine shop. Magnafluxed and 3 angle valve job: $180 I have a high flowing head with only about 400 total wrapped up in them and they are roller ready.

Here's some pics and info on my website Go to Chevelle page then heads..

Also a good site: here

[442time]

Thanks for the info guys

[ict55chev]

I have gone to a site called MorTec, they give all the info for the gm castings








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