Hi everyone,
It's been a long time since I've been on here, but I have my '67 Firebird back and ready to be reassembled, so I should be on actively for a while again. I am trying to decipher which engine I have - the car does not have its original engine. I've gotten the block casting # off the back, and it's 9799914. After researching, that shows this being a '70 400 block, but it is a YD code, which doesn't gel with the block casting #. Seems like the 9799914 blocks are supposed to have YB, YE, YS or YZ codes. Can anyone help me with this conflict? Any ideas? Thanks!

winston

Is there a "70" stamped beside the distributer?

1970 400 290 HP YD A 10.0 254 16/sm valve 1-2 7040060/64 Block Casting 9799914

from wallaceracing.com 2bbl small valve #16 heads (check casting dates on heads).

I've got that same engine as my "spare". It still has the 16 heads and 2 bbl carb. That casting # is the same as the Ram Air 3 block. I would think that our blocks are 2 bolt mains, but drilled for 4 bolt mains. Are you going to be rebuilding this engine? I would love to know if these non RA blocks are drilled for 4 bolt mains...

--Kyle

Thanks for all the helpful posts! When I purchased the car 3 years ago, I was told it was a mid 70's 455 block. I am really happy to hear that I have a 400 since my car is an original 400 car. Not that it makes it correct or anything...just my call-out emblems will be accurate.

Kyle - eventually, I do plan on rebuilding this engine. It'll probably be next winter's project. It runs really good now and is still in the car, so I wanted to assemble the car, try to enjoy it during the summer and then see about breaking her down after that. I'll probably be extremely active on here when I do rebuild the engine since the folks on this site have a lot of knowledge and are willing to assist with advice. Quite honestly, I'm a bit curious myself. Maybe someone else has torn down a 9799914? I'll definitely keep you informed when I find out.

winston

Maybe someday I'll pop that oil pan off... It's sitting on the garage floor with the auto trans still attached. I've got a 6 month old daughter now so tring to find time.......

Hey Kyle,

Congrats on the daughter! We have a 7.5 month old son, so I know exactly what you mean about finding the time. Spare time is as precious as our boy is....well, not quite, but you know what I mean.

Good luck with everything.

winston