I have been thinking of installing roller rockers on my 65 L-79. I have been looking at Harland Sharps. Has anyone done this and used the stock valve covers? Also, do you see any advantage installing these.
Your either going to need valve cover shims or several thick gaskets with reinforcement in between. Stock covers and stock gaskets won't cut it. If you have power brakes then you have to check clearance there also but it should be ok.
i would go with the comp cams roller tipped rockers..great for street reliability and no problems fitting a stock cover set up...
Problem with a full roller rocker is that the poly-lock style rocker nut is too high to clear the underside of the stock valve cover. Unfortunately, there is no short poly-lock style rocker nut which doesn't stick above the top of the rocker stud (as far as I know).
Alternately, one can't use a self-locking nut because the slot in a full roller rocker is not wide enough.
I've used the Comp Cams roller-tipped rockers successfully for many years as long as the valve spring pressures at full open have not been above ~300 lb.
NOM61 I am currently using Comp Cams roller tip rocker arms on a 427. I used two cork gaskits glued together and have plenty of clearance. Not sure about a small block?
Whats the story behind the MGA avatar?
I run Comp Cams Pro Magnum full roller rockers on my small block. I have a set of Pep Boys chrome valve covers (stock in dimension) and run the THICK Fel Pro valve cover gaskets. Everything clears fine.
I ran this set up back in the late 60's on my '63 with no issues... I guess I just didn't know better back then.
Unfortunately this is what things tend to look like after 36 years in storage...
I'm now in the process of restoring the car to be period correct with a hydraulic roller and the same rockers. However this time I'm using these covers from PML...
The covers are much more substantial than the stock covers and provide about a half inch additional clearance. http://www.yourcovers.com/valve_covers_11026.php