ID the block
 

these are the numbers stamped on the pad on the front of the block I can't get a camera in to see casting numbers Power Glide kick down bracket is in my way ...im searching :waah:.....this is a 69 c-10 half ton and the glide is original and on the SPID I didn't and can't get any info from the PO or the PO before him someone did a recent resto that's just OK .... the heads are interesting and what's got me wondering 327 ....69s came with IL6 307 350s not sure or is this a early 69 with a leftover 327 ??? or a 350 that's been upgraded some what ?

PS in my younger days if you had the number stamps you could put any Id# you wanted on that pad:devil:

Re: ID the block
 

I looked here ????? I know no more now than I did before

https://nastyz28.com/sbchevy/sblock.html#ecode

Re: ID the block
 

Can't tell you about the block, but those are Fuel Injection/high performance heads.

Re: ID the block
 

thanks yes I know! that's exactly why in trying to identify the block they are sitting on... when I get some time ill take a V cover off and see what flavor the heads are :devil: you probably know better than I they made a few versions of thus HUMP Heads

Re: ID the block
 

Never mind

Re: ID the block
 

beat me too it

Re: ID the block
 

Those will have 2.02/1.60 or 1.95/1.60 diameter intake/exhaust valves. Not sure there is any way to tell by looking at the casting numbers, but it's been a dog's age since I worked with anything like that...like 30-40 years. There isn't much room inside the head for the 2.02/1.60 valves. They are really close to each other and the thin area was prone to cracking.

Re: ID the block
 

Using the last 3 digits (letters) of the stamping, search here for the original configuration, year of the engine, and what vehicles it was installed.

http://camaros.org/pdf/LimeBook.pdf

Re: ID the block
 

What I could find is the HC suffix code was for a 65-66 250hp 327 with 4 barrel carb and power glide transmission. This would most likely have been in a Chevelle. This was in the era of 2 digit suffix codes, but for some they had 3. HCH was the same engine with a Holley 4 barrel and HCR was the motor with a Rochester.

This was an interesting find as I had not seen that before. You learn something new all the time.

Re: ID the block
 

Intake is '68 and back with a plug in the filler hole. Can you see a date on the intake?

Re: ID the block
 

I will look tomorrow thank you

Re: ID the block
 

I appreciate all of you helping with this.... learning all the time too I knew that plugged manifold meant something just didn't know what...... what makes this board and its members who we are and always looking to help
thanks again we will come to a conclusion (break the code) on this at some point I now have to look at the carb see if its a ROTENCHESTER :) to be continued
Happy Healthy New year to all

Re: ID the block
 

numbers of the carb comes back 1974 Chev

Re: ID the block
 

The heads and block are "numbers matching".. It appears that at some point in the past, the carburetor was changed..

Re: ID the block
 

1966 327 275 hp roc. carb powerglide trans very common back in the day, hard to find now

Re: ID the block
 

"What I could find is the HC suffix code was for a 65-66 250hp 327 "

Did I read the suffix as HCR? That would make the block build after 1970, when GM went to a three-letter suffix, as they had used up all the two letters. Would know more if the block casting number wasn't hidden from view by the bracket for the PG kick-down.

The heads were manufactured with 2.02 and 1.94 valves. If you install 2.02 valves in this head, they will flow less than in the 1.94 valved head. The reason is GM cut back the chamber on the 2.02 heads on the intake side only. This unshrouded the valve so the larger valve to flow correctly. Very few conversions have the chamber machined. Typically, I just see it on the factory 2.02 heads. There is a tool to cut back the chamber wall, but most machinists do not bother.

Re: ID the block
 

thanks for that info.... im going to get to that casting # on the block one way or another and the intake # too

Re: ID the block
 

the hcr code is 1966 327 275 hp and that is for sure lol

Re: ID the block
 

hi, post 15 is correct. I found the same thing, BROWN 70