I agree.
I believe JS's roller rockers are 1.85:1 and as such should only be used 
with a stock cam.
While I'm no expert, from everything I read and hear (Vizard, Kastner, 
Burgess and others) there's lots more to performance than increasing the 
lift on a stock cam.
Don Malling
Rob Pennington wrote:
> Check out the performance parts from Ted Schumacher or Richard Good:
> http://www.tsimportedautomotive.com/
> http://www.goodparts.com/parts_roll_rock.html
> 
> I haven't bought a set from either gentleman (yet) but they are on my 
> list and I sure like looking at their web pages.
> 
> Rob
 
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