Chevy rockers????

[frank b]

I have seen it mentioned here before but can't seem to come up with anything on a search.
What is involved with this Chevy rocker conversion?
Is it stock rockers or 1.6 ratio?
Roller rockers too?

Thanks

Anyone running a weber carb on their six?

 

[Anonymous]

Frank, you can install plain non-roller chevy six cylinder rockers (they are 1-1.75 ratio vs stock ford six which are 1-1.6 ratio)
BUT you need to have 3/8 rocker studs in your engine head. tim

 

[frank b]

Very interesting, thanks for the reply Tim.
So, I suspect that the ford 300 rocker studs are pressed in? As are the Chevy 3/8" studs? What size hole do I need to drill for the 3/8" studs. I won't be doing this myself, just like to have all the info. My head has one rocker stud that likes to creep out causing the valve train to tap. So I planned on removing the head and having it completly re-done.

Why can't we use roller rockers? Or don't they exist for the chevy inline?

 

[nitrousnick]

for a 300 ford six i used big block chevy rockers,i have erson roller.stud size is 7/16 .they make them in a 1.6 ratio ,stock b.b. chevy is 1.72 will also work and give you more valve lift.

 

[frank b]

Thats even better, thanks guys.

 

[mhg]

Im running the smaller weber from langdons stovebolt
stock 300 with over 100,000 on the clock
this size is good only for the stock engine
I get much better throttle response than with the stock
1bbl.

 

[Anonymous]

what benefit could I get from my 300 with a dp 4bbl intake 390 Holley and efi manifolds? worth pulling the head?

 

[Anonymous]

What I mean is it worth pulling the head and having the 3/8 studs added and install 250 chebby rockers? how much hp? this is just a daily driver wanting some more juice

 

[Thad]

The biggest bang for the buck using chebby pieces in a 300 is the sbc valves.

 

[80broncoman]

I think at low Rpms like under 1800, A 300 with a good intake small 4bbl, EFI mainfolds or a header and good exh system Will feel like a 351W.
It really does feel like a different engine :!: :!:

 

[frank b]

Im running the smaller weber from langdons stovebolt
stock 300 with over 100,000 on the clock
this size is good only for the stock engine
I get much better throttle response than with the stock
1bbl.

Do you recall what the jet sizes are in your carb? Do you have Carter/Weber, or the Holley/Weber progressive?
I have a Weber progressive I want to install soon.
Thanks