Technical Early Mickey Thompson valve covers

Well after many years of searching for some of the most hard to find valve covers , i have had the greatest streak of luck and managed to buy three sets in a matter of weeks. What i bought are the early casting Thompson ( 1959-63 ) and two sets of the 1964 Mickey Thompson M/T logo version for Pontiac. I have a question regarding a casting number on 1 set of the 64 set . One set has it and the others do not. So if anyone else out there has any to compare or info that would help please comment or message

 

Pics and the casting numbers would go a long way, I’d think for those that know

 

I've got two sets of the Thompson ones but have never seen the early Mt ones in person

 

Nice score

 

So is ther any numbers on them thanks

 

Don't know about the ones that are on my car but the spare set I have have nothing on the inside

 

Thanks for looking. Thats a nice ride ,did you make those headers ?

 

I found a set of M/T valve covers a few years ago. They said Mickey Thompson and General Motors inside the valve covers. Both covers were still in sealed boxes with GM part numbers on the labels

 

I like the ones with the the large M/T cast into them..

 

Sigh............I'd love to find a pair. Closest I can get is a pair of no-name Edelbrock covers, later M/T covers and a pair of those $64, 5 fin made after 2000

 

I got a set of the later M/T rocker covers with the built in breathers. I got an idea that they are 70s chit. I always wanted a pair and now I wish I had different ones.

The early M/Ts are the Holey Grail. here is an interesting Tid Bid. In my quest for whatever was in vogue at the time I have seen the really early ones several ways, cast in numbers, no numbers and some with a number boss and stamped numbers. I have no idea of the significance of this but it does muddy up the waters a bit.

 

I found these big block chevy's interesting, look like a M/T casting but no name inside, only the number and made in Japan. Sold for $115 on marketplace, I've seen similar but with a name cast inside.