67 400 #s
 

I'm checking on a 67 400 eng. and the seller states that it's a special J stamp engine . That's what he was told but there's nothing about any special 400 for 67 that I've seen yet . As far as eng #'s there's only a couple three #'s for 400's . Any #' that I missed ? Thanks for any info !!!

Looking through my book of engine codes, etc. :

the 2 letter stamping on the front of the block is the engine code. There are 3 codes in 1967 that contain the letter J.

XJ is a 350 horse 400 from a big car.

WJ is a 376 horse 428 from a big car.

YJ is a 326-2bbl from a Firebird.

Buyer beware :D

Ron.

Thanks for that info . Is there any thing out of the norm about the J other than ID ? I figure it's nothing more than a 67 400 engine . There was a nice story attached to it also but kinda long !!!!!

Not that I've heard of, but I'm just a Pontiac enthusiast, not an expert :)

Best case scenario is that it's really a 428 and they don't know it. (in my opinion)

Thanks for your help !!!

The two letter code on the passenger side of the front of the block will tell you what it is. I also believe that 428 blocks actually had "428" cast into the underside of the block on the passenger side.

If the head casting number is 143 than it is a 400 As many of the big body cars in 67 got this 400 which came fitted with these 389/ 421 type heads.

If it has 670 heads, it could be a 400 or 428. Need to get the date code off of it by the distributor, and the code on the front of the block, as they re-used codes throughout the years.

If it is a 67 block the casting #s are. They are at the back by the distributor hard to see in car.

400= 9786133 casting #
428=9786135
326=9786339