I'll also vote that it's a 110 intake. Pop that bottom cover off. You can ramp those rivets out by pushing a thin screwdriver under the cover so it just misses the shaft of the rivet. Same rivet can used to put the cover back on. Done it many many times.

Wow- that tumbling job looks stellar!
What does that cost, roughly??

No way i would of tumbled that intake. I use Navel Aluminum Jelly from Loctite. Great cleaner. Soak intake in real hot boiling water, remove and brush on this Aluminum Jelly let it set for a good 10 minutes, put intake back in boiling hot water and brush off with a good paint brush. This will leave a natural casting finish just like the intake came out of the foundry. Just my two cents.

I popped the heat shield off and this intake is dated 3.20.70 while it also has another number of 5730 cast below the date code. It's gone off to be tumbled and I also found a nice clean 472 intake which I will drop off to be vapor blasted with a nice set of 417 valve covers. I'll post a couple of pics of them side by side when both are done.

Decided that the tumbling process was likely better to get inside all the ports and the intake runners than vapor blasting so I decided to have both intakes tumbled. They turned out really nice and I'll re-stake the splash shields later today with some epoxy added to ensure the rivets are set. I'm keeping the 472 intake on the right and will sell off the 116 intake on the left. It's dated 3.20.70 as noted above. Not a lot of difference between the 2 except for the front oil plugs and the 472 intake having one added reinforcing web on the underside distributor boss.

https://i.ibb.co/Pwfj3w0/IMG-4196.jpg

https://i.ibb.co/x6Mq49C/IMG-4199.jpg

https://i.ibb.co/TwcXkmd/IMG-4205.jpg

Thank you, I've always been curious what the difference was.

Probably not a '116. The '116 was a OTC replacement for the LT-1 '110 and the 69 '472, so it had the freeze plug in the oil filler tube location. 3-20-70 fits in the '110 time-frame also.

Heres a Z28 Intake I had Vapour blasted today, I like that it still retains the GM silvery finish and the Winters logo and part numbers are nice and crisp. I think it came out pretty decent, considering it was a old extremely dirty example. Sorry no before pictures, thought I took 1 but forgot.

Looks good Mike. I was going to take one up to Don's and see how it compared but Todd was quick to tumble both of them before I could pull one back. I think both methods look good. I would like to see them side x side in the same lighting.

Actually I didn’t take this to Don, a friend was by the shop and he made his own vapor blaster out of a small modified glass beader cabinet , with #13 slurry and pressurized liquid. We actually only spent about 6-8 mins on this 1, it’s for a 77 Z motor I put together for a friend, it had been on the car since late 70,s and the car sat for about 25 yrs outside and was super water coorroded and stained & scudsy even after soaking it in my 5 gallon pail of carb cleaner, and pressure washing it off. I didn’t want to glass bead it , but really didn’t like the finish, so I decided to give it a try. Super pleased with how it turned out, I think Don has a commercial machine, and the finish & quality would be even better.

Mike.