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RJ Sledge · 09-03-2019, 07:31 PM

I believe that once NHRA takes a good look at this it will be reversed. I'm sure that this has happened many times over the years with part numbers added and dropped by mistake when updating blueprint specs. Have seen it happen a lot and have seen many mistakes. Big problem is Ford had part numbers and casting/engineering numbers, common parts number for early Ford heads always had a "6049" middle number and casting/eng commor middle numbers were "6090" and I believe that is where NHRA got confused when adding or dropping head numbers. Like D70E-6090-da casting number on head could have been the D70E-6049-dc "part number". Same head just different numbers one a part number and the other a casting/engineering number cast on head.

You need to remember to not take anything for granted when it comes to changes to casting/part number addition and deletions. You need to keep an eye on the blueprint specs for your own combination(s). If you find something not right you need to notify Pat at NHRA and get it sorted out. And get it in writing. Wesley is the best at this, but don't know if he is getting involved in this or not now, but he understands Racers and the problems they can run into.

I can imagine that its an overwhelming job staying on top of this and mistakes happen quite often.

Gary and Mike good luck with the outcome.

R J Sledge

09-03-2019, 07:31 PM	#13
RJ Sledge Senior Member Join Date: Jun 2007 Posts: 790 Likes: 504 Liked 291 Times in 92 Posts	Re: Mike Graham/Gary Summers I believe that once NHRA takes a good look at this it will be reversed. I'm sure that this has happened many times over the years with part numbers added and dropped by mistake when updating blueprint specs. Have seen it happen a lot and have seen many mistakes. Big problem is Ford had part numbers and casting/engineering numbers, common parts number for early Ford heads always had a "6049" middle number and casting/eng commor middle numbers were "6090" and I believe that is where NHRA got confused when adding or dropping head numbers. Like D70E-6090-da casting number on head could have been the D70E-6049-dc "part number". Same head just different numbers one a part number and the other a casting/engineering number cast on head. You need to remember to not take anything for granted when it comes to changes to casting/part number addition and deletions. You need to keep an eye on the blueprint specs for your own combination(s). If you find something not right you need to notify Pat at NHRA and get it sorted out. And get it in writing. Wesley is the best at this, but don't know if he is getting involved in this or not now, but he understands Racers and the problems they can run into. I can imagine that its an overwhelming job staying on top of this and mistakes happen quite often. Gary and Mike good luck with the outcome. R J Sledge Last edited by RJ Sledge; 09-03-2019 at 08:01 PM.