Staggered bolt to straight bolt valve cover adapters?

http://www.ebay.com/itm/55-59-Stagg...rd-Head-Adapter-283-265-327-543-/141839724055

 

Here's an odd wrench in the tool box. I have a pair of STAGGERED bolt pattern MICKEY THOMPSON valve covers; on the INSIDE of them is casted, "CHEV-327". ?????. Just an odd "identifier". We all know the straight across pattern came out in mid-59, and the 327 came out in 62, so there's no way a "327" would have been available with staggered patterned valve covers by Chevrolet. Must have been an "import/language" issue. For the OP, just go with later, but still "vintage" valve covers; 99.99% of the guys out there won't know what's what anyway. I am Butch/56sedandelivery.

 

Those are the covers.

 

Hmmmm, 3/8" would be enough to clear roller rockers...Hey, I could put 9 fins on the motor in my S10! That should cause some confusion!!

 

i have 5 sets im a 283 nut pm me with your address i will send you a set they will need cleaned and painted and maybe a ding or to worked out

 

Staggered bolt pattern covers were through mid-year '59. I have a set off of a 4V 283 out of a '59 wagon.