BB Rocker shaft diameter?

[myasylum]

Could someone measure the diameter of there BB Rocker shaft for me?
I'm wondering if the Rocker spacers for BB and SB will interchange? I found springs, and they looked pretty much the same.

Thanks!

 

[Mrmopartech]

The shafts are .875,mrmopartech

 

[myasylum]

Well on my SB I got .871. Thats just a hair off. I think the BB spacers should work!

Thanks!

 

[Longgone]

I believe most are .875 but I`ve seen .872 in aftermarket pieces.

 

[Kernel Sanders]

Yup stock are .875 at least on my 68 383

 

[myasylum]

Thanks a lot guys! I think this will work! Something for you guess to keep in mind to for future reference!
Just out of curiosity, what is the length of the rocker arms?

Thanks!

 

[Kernel Sanders]

The stamped rocker for my 360 (1976) was 3.141 and the stamped rocker for my 383 (1968) is 3.304. Now because these are stamped the tolerances likely vary a bit maybe even between the left and right stampings... I didnt check but I can if you like.

*These are no scientific measurments just rough length measure but hope they help answer your question.

 

[myasylum]

I kind of meant the length of the rocker shafts... Sorry.

Yea, I just pulled off my stock rockers, and when checking the pre load I noticed the play on the stock rockers are just awful. It's hard to find the preload because each rocker has a bit different play. Because I am a poor boy right now I just bought those Crane Iron Ductile Rockers... and the play is gone. It was so much easier finding the pre-load with those, and each rocker didn't vary so much. I was thinking it was each valve that was that far off, and I was getting concerned. Here it was the stock rockers that caused the variance.

 

[Kernel Sanders]

I can measure the shafts when I get home but the big block are longer and the bolt holes do not match a small block.

 

[myasylum]

I understand. I was just interested for curiosity sake what the difference was.

Thanks!

 

[Kernel Sanders]

I just measured with a tape measure and the big block shafts are about 20 3/16 and the small block about 19 3/16 or so.

 

[TXcharger07]

I kind of meant the length of the rocker shafts... Sorry.

Yea, I just pulled off my stock rockers, and when checking the pre load I noticed the play on the stock rockers are just awful. It's hard to find the preload because each rocker has a bit different play. Because I am a poor boy right now I just bought those Crane Iron Ductile Rockers... and the play is gone. It was so much easier finding the pre-load with those, and each rocker didn't vary so much. I was thinking it was each valve that was that far off, and I was getting concerned. Here it was the stock rockers that caused the variance.

Stock rockers are supposed to be really good.. maybe another issue? bad springs?