350 or 305

[4x4k20]

i have an engine that came out of a 86 k5 the sticker under the hood says 305 but i tore eng down it has a 4bolt main they didnt build 305s with 4 bolt mains or did they ?

4x4k20

 

[dyeager535]

check out my web page for the casting number links. I believe the 305 has either 305 or "5L" (5 liter) cast into the back of the block, behind the flexplate.

Dorian
My K5 and Chev/Olds tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>

 

[Can Can]

From what I've heard, 305's DON'T come with a 4-bolt main. That's only one of the reasons my next motor wil be a 350........



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[tRustyK5]

AFAIK the 305 has a smaller bore than the 350...if you have it tore down just measure the bore. If its 4.000 or a little over its a 350...under 4.000" (like 3.750") then it should be a 305.
The stroke is the same.

Rene

<A target="_blank" HREF=http://jules.coloradok5.com>http://jules.coloradok5.com</A>

 

[jimmyjack]

On the left rear of the block there will be a stamp. 5 or 5.7 5.7 is a 350.

"My blazer may be slow, but it goes faster at higher speeds"

Jim