8445 oil test heads from g body parts good or bad?

[farmer Gary]

got a set of heads from g body parts around 16 or 17 years ago. took them to a machine shop to have them refreshed and ready to install,, valves grinned, spring pressure checked , flatness and head gasket surface resurfaced due to some light rust pitting.
Machinist call me and said after checking withe the local Buick dealer that Quote " oil test heads are severely over heated due to the test conditions and the would crack and destroy the engine if installed!
Any body have any experience with these heads? I don't see any thing I'd associate with being over heated, heat tabs glued on-the freeze plug at the end of the heads are good. no discoloration of the sealing surface, ie blueish,gold tinting, area around valve springs clean, there was a fair amount of deposits on the exhaust ports and valves.
the heads came in a box labeled Bowden MFG.CORP, 45090 BEIDLER ROAD , Willoughby, OHIO 44094 U.S.A. and they are stamped
on the opposite end from the heat tap BW-3-961613 and DO NOT REMANUFACTURE.

the reason I'm getting the heads ready to go is My 86 WH1 t-type blew a head gasket on cyl 4 and to speed up repair I figured it would help having a set of heads ready to go if no other problems show up during the repair.
I find it hard to believe that the local dealer would have much experience with turbo Buicks let alone oil test heads.

any information about these heads would be appreciated

 

[joed]

There was a member named David chase waay back that found and was selling what you may be referring to as “oil test heads”. I have NEVER heard anything like your dealership contact or anything negative at all. Search turbo buick.com and/or gnttype.org for details. They were calling them “stage jr”. Also I thought Gbody had a similar write up on origin and benefits. I love mine.