bellhousing casting #'s

[indyjps]

need source for bellhousing casting #'s, came across over 40 chevy aluminum bellhousings in a junk yard thats been closed for 25 years. owner is letting me pick and choose. i picked up 7 of the the '621'. and want to identify the rest. please help, there is tons of stuff in these building and im slowly sorting through it. my own barn find i guess.

[indyjps]

heres a list of the bellhousing #'s that i found in the pile, are any of these worth picking up. if so what kind of price range. thanks

3858403
6263753
3840383
3788421
6270026
464697
360162

[lzdick]

The 403 is on a '69 Z-28 and the 383 is a universal GM replacement, I believe.

[Verne_Frantz]

The 421 bell is '63 only. All Corvette and small block passenger car. Even though it's a one year only piece, they typically sell for $20-$50.

Verne.

[John Brown]

I think the '421 has a smaller hole for the trans front bearing retainer. Won't fit most 4-speeds.

[x44d80]

I bid on several "403" bellhousings on Ebay and they all went for around 100.00, then I bought one at a swap meet for 20 bucks. I guess I'ts how brave you are and how cheap you can get them for.

[Verne_Frantz]

John,
The 421 does have the small hole for the front bearing collar. The '63 Borg-Warner T10-D1 case used a smaller front bearing. When the first Muncies were placed in production in April '63, they also had the small bearing and retainer. If a 409 was ordered in a passenger car in '63 the same 553 open bottom bell was used (as in '61 & '62). The trans was basically the same, with the small front bearing, but had a different front collar with the same bolt circle, but a larger outter diameter to fit the bigger hole in the bell.
In '63, you could take a small block T-10 or Muncie, swap the front bearing retainer for the larger version and use the 553 bell if desired. You could also take a '63 409 trans and swap to the smaller (alum) retainer and use the 421 bell.

Verne.