Can someone help me find info on my block?

[HumptyDumpty79]

I did a 350 to a 454 swap in my 79 k5 and i need to know some info on it. Mostly just want to know if its a 1 or 2 piece rear main. All i can find is that its a 73-79 block. Can someone help me?

 

[GsxrMike]

No casting #?

 

[HumptyDumpty79]

No casting #?

Aw crap. Sorry. Its 3999289.

 

[tRustyK5]

One piece rear main started in '86 or 87. Either way yours should be a two piece rear main.

http://www.mortec.com/castnum.htm

Rene

 

[4X4HIGH]

BBC did not go to a one piece rear main until 1991 IIRC.

From Mortec website.

3999289....454.......71-79...2 or 4 bolt, some "CE" replacement blocks had four bolt main caps

1991 and later Gen.V, VI and VII production BBC motors have one-piece rear main crank seals

 

[tRustyK5]

Missed that it was a big block you were looking for ID on...

3999289....454.......71-79...2 or 4 bolt, some "CE" replacement blocks had four bolt main caps

Rene

 

[tRustyK5]

Scott beat me to it...what a surprise. lol

Rene

 

[4X4HIGH]

You're too slow Rene.

 

[tRustyK5]

[yoda]Quick draw MrGraw you are[/yoda]



Rene

 

[HumptyDumpty79]

[yoda]Quick draw MrGraw you are[/yoda]



Rene

Awesome. Thanks guys!