All sounds very unlikely. The EUN is a sequential block casting number and it was stamped as the blocks were machined after casting. It would be extremely unlikely that a block would be sent into a car without it. The early date on the heads makes it verily likely that they come from an early production manual trans base 350 horse engine GTO. If the block has a similar date code it’s probably the matching WT block from that early base engine GTO.
A far more probable scenario is a previous owner simply got a 69 GTO WT engine and had the original EUN, engine code and VIN filled in or ground off and then stamped a WS to make it look like a correct judge engine. The majority of judges had their engines blown and lots of people restamp blocks to make it look correct. A little paint scraping would tell the story.
__________________
My Break Away Squad
1969 Fbird (Base, 350 & Sprint Cvt’s - 400HO & TA Hardtops)
1969 LeMans (2dr & 4dr Hardtop and a Cvt)
1969 LeMans Safari 2 seat Wagon
1969 GTO (2 Cvt, 2 Hardtops & Judge Hardtop)
1969 Catalina (3 Cvt’s & a 2dr hardtop)
1969 Ventura 2 Seat Wagon
1969 Executive 4dr Sedan
1969 Bonnie Cvt
1969 Bonnie 3 Seat Wagon (2 of them)
1969 Bonnie Brougham (4dr Hardtop & Cvt)
1969 Grand Prix SJ (2 of them)
1969 2+2 2dr Hardtop (Canadian model)
|