quick question OLDS 5A heads

[TURNA]

You dont see the differance between the two??
You best get some glasses brother, LOL




ok maybe the size close but the script is different the number and the letter on your pic.
On my pic the script is the same for both.

I believe you mean this which is clearly different in size, THose heads I posted have the same size 5 and A

 

[1bad79]

The script is really weird on those 5a's every set of old ones I have has a small A it almost looks like the 5 is smaller than the A you could cc a chamber to verifi but the smoking gun is the casting number pointed out

 

[TURNA]

I didnt get them yet I wanted to know what they were first

 

[1bad79]

I didnt get them yet I wanted to know what they were first

Oh I thought you had them already

 

[TURNA]

I would use a set of 307 5A's too simply because they would bump up the compression nicely

 

[olds307 and 403]

Look in the center exhaust port. If the divider is nearly flush, it is a dead giveaway for earlier heads. The 5A 307 heads have a very recessed divider. That and measure the valves 1.875/1.56 vs 1.75/1.5. Those are very rare heads, very few made. For some reason Olds didn't use the 6A until 85, swirl port heads with a normal exhaust port and even then very few out there.

 

[1bad79]

I didnt get them yet I wanted to know what they were first

I'm going to run out to my shop a minute and snap a pic of a unmolested 68 350 I happen to have with 5 heads

 

[1bad79]

We have to make it to the back corner where my finger is pointing at the saw...TOO THE CORNER!!!

 

[1bad79]

68 350 45000 miles never apart the 5 is much larger than I remembered

 

[1bad79]

The other thing I notice is the fake screw head by your number