3748947 FI Adapter Reclamation

[Loren L.]

Price was right on a Bubba reclamation project 3748947 adapter.....plenum studs are 3/8" X 16 X how long and from who?? Thanks.

[Tom D.]

Re: 3748947 FI Adapter Reclamation

Would studs on 3826810 be the same? Made in 1965, I believe. Let me look.

On the manifold numbered above, the studs stick up 1 & 3/8".
The unthreaded area is 5/8", between the upper (fine threads) and the lower (what i believe to be "coarse" threads.

[Tom D.]

Re: 3748947 FI Adapter Reclamation

57-59 photo from ebay item. Looks longer than what I posted above. This manifold is said to be 3748947. Listed now. My guess is 3".


studs.jpg1957 1958 1959 Chevrolet Corvette Fuel Injection Unit Bedplate and Plenum
is the title on ebay. Please view there for a much better version of the images.

[Barry H.]

Re: 3748947 FI Adapter Reclamation

Loren, 8 studs, 2.050" long, 3/8-16 thread on bottom, 3/8-24 threads on top, small dimple on shaft, fine Thread end.
I think John DeGregory has "Repo's". Barry Holmes

[John D.]

Re: 3748947 FI Adapter Reclamation

Tom, 63-65 studs are shorter. When I install them i let them stick up 1-8/32 to 1-9-/32.

Loren Our own Paul Mazut has the best repro '57-62 studs. The top of Pauls studs are 100% flat. Paul has a website.
You didn't ask this but RP used at least 4-5 different companies studs. Only one company had dimpled tops.
Now the 63-65 dimpled studs appear to be from one company which is not typical.
As far as how fat the '57-62 studs stick up I forgot

[Gary C.]

Re: 3748947 FI Adapter Reclamation

Used CRC Freeze Off to remove stuck studs from several '57 FI manifolds

Gary
....

[Loren L.]

Re: 3748947 FI Adapter Reclamation

Gary, removal of something that's not there is not a problem. John, e-mail sent to Paul for $ and shipping - probably time to buy 2 sets, so I'll have some on hand for the adapter I score in 2027. Also, "no dimple" is not news to those of us who've had one since 1972. Thanks to All. It's like being in my 30's again.......