Head Identification????

latil · Post by **latil** » Sat Apr 28, 07 10:44 pm

Send that lot over as well then

Jules · Post by **Jules** » Sun Apr 29, 07 12:07 am

That's a nice motor you've got there ...

DaveBishop · Post by **DaveBishop** » Sun Apr 29, 07 10:58 am

I would check what engine you have as well it might be a 340 or 360. If the heads have been put on an early 318 they should have been milled so as to get the compression back up. You never know just your luck you could have a 340 or 360.

Anonymous · Post by **Anonymous** » Sun Apr 29, 07 10:58 am

Cheers mate.

Did you know these heads were fitted?

Anonymous · Post by **Anonymous** » Mon Apr 30, 07 7:38 pm

DaveBishop wrote:I would check what engine you have as well it might be a 340 or 360. If the heads have been put on an early 318 they should have been milled so as to get the compression back up. You never know just your luck you could have a 340 or 360.

Never thought of that, I'll have a look after dinner. Cleaned all the crud off today, thay are J heads.

Anonymous · Post by **Anonymous** » Mon Apr 30, 07 10:06 pm

Its definatley says 318 at the front of the block too.

JohnR · Post by **JohnR** » Mon Apr 30, 07 10:26 pm

Thought I read someplace that ta heads will only fit a ta block ??????? holes for pushrods were different or something but my memory is not good these days now what was I doing???????????????????????????????

Kev · Post by **Kev** » Mon Apr 30, 07 11:32 pm

Go on fella! Get yer ruler out and put us all out of our misery!
273 = 3.63" bore
318 = 3.91" bore
340 = 4.04" bore
360 = 4.00" bore
All have 3.31" stroke except 360 with a 3.58" stroke. Take into account overbores as well.

DaveBishop · Post by **DaveBishop** » Tue May 01, 07 9:33 am

They are T/A castings before they are finished. They must have had lots of heads left over for the 1970 production line. Because they were going to carry on the 340 T/A in 1971 but didn't. I don't think they would have thrown them away knowing Chrysler do you. I have had a few pairs of these heads over the years some with big inlet valves some not. All fitted the other small blocks with some machining on the 318

Anonymous · Post by **Anonymous** » Tue May 01, 07 7:46 pm

I think I have done this correctly. My cylinger bores are the standard 3.91 (with no ridge at the top

). I raised piston 1 to TDC and measured from deck to piston top and re-set my calipers to 0 at this setting. I then put the piston the bottom of its stroke and it measured 3.40.

I did this 3 times and came up with the same reading every time. Am I doing something wrong?

How do I work out a true CC from this?

Dave-R · Post by **Dave-R** » Tue May 01, 07 7:55 pm

That is 331.6 cubic inches.

Gareth · Post by **Gareth** » Tue May 01, 07 7:57 pm

It must be an early hemi with T/A heads on it then

Anonymous · Post by **Anonymous** » Tue May 01, 07 8:00 pm

Cheers Dave. Have I measured it right? I have just done the same on cylinder 4 and came up with the same reading. Can you get stroker kits to make a 318 ino a 331? Would it really be worth it with 340's and 360 small blocks about?

Dave-R · Post by **Dave-R** » Tue May 01, 07 8:34 pm

I have NO idea mate.

You can even get cranks offset ground to get more stroke. Just to confuse things further.

Anonymous · Post by **Anonymous** » Tue May 01, 07 8:56 pm

Please don't confuse things any more.

I'm quite happy with the fact that my "stock" 318 isn't at all stock and doesn't appear to be a 318.

I am a little confused why someone would go through the hassle and expense of strokin a 318 to 331 when 360's are readily available and probably cheaper than a stroker kit.

And while all this has been done it still has points in it.