1.6 Roller Rockers on 400 sbc head..... What needs to be done?

[speed_demon]

ok i have a set of 1.6 CompCams Rollertip Rockers that i got from a friend. I want to install them in my truck but i need some info on installing them.

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They are 1.6 Ratio

1: What other parts do I need? eg... guide plates, studs, etc
2: Do I need to machine the heads? eg.. pushrod guide holes
3: What kind of gain will i get?
4: what are the cons?

my engine setup
350 4 bolt main (unsure of being bored out or not)
400 heads 2.02 intake ?.?? exhaust (PnP'd)
edlebrock torker 2 intake
edlebrock 650 cfm carb
"ASUMMEABLY" Stock cam
hedman headers w 2.5" exhaust
Accell Billet dist.
turbo 350 w/ 2500 stall built internals
10 bolt 1 wheel peeler! LOL
no a/c, smog
Electric fan conversion
160* therm


I must say that the motor is really strong where i really suffer is the fact that my rear-end is garbage 2.73 1 wheeler. <------ she still gets up and goes but not like she should. (but i'm working on that)
I got these rockers for working on a friends 4-wheeler. Not a bad deal I guess.



http://www.facebook.com/video/video.php?v=199832536700659

 

[Manbearpig]

I have those rockers on my 193s

I had to drill out my pushrod holes.
You might take your heads up to a machine shop and ask them what needs to be done.

 

[speed_demon]

how much did you drill them out?

 

[Manbearpig]

Used this guy

http://www.summitracing.com/parts/CCA-4710

and a 5/16 bit and went to town

 

[speed_demon]

nice! Obviously the head was off right?
As of now the motor is still in the truck, and running. I'm gonna need to pull it later to change the bottom end gaskets and a few other things. my budget is kinda tight so it will be a while before i can actually get some head gaskets to do drill them out when i do all this i want to get a cam to for it.
this is the cam i want to get for it too.
http://www.summitracing.com/parts/SUM-K1105/
and what kind of springs would i need for this cam? <-------------------NEVERMIND ON THAT QUESTION I FIGURED IT OUT!!! OOOPPPPPSSSS!

 

[Manbearpig]

Might need to get the valve guides machined since with the 1.6 rockers the lift will be about ~.495/.518

 

[speed_demon]

I was told by a buddy that i need to switch to a "solid lifter type" cam to use these is this true and why?

Might need to get the valve guides machined since with the 1.6 rockers the lift will be about ~.495/.518

you mean if i use the cam i mentioned? or stock one?