Rail Rockers on 289 Small Block Heads

[Shaggy]

The HI-PO's actually had guide plates (I can't verify that because I have never actually seen a stock set of hipo's) The ones I am talking about were actually made before the 289 existed and a few got carried over onto 289's during the first couple of years of production. I actually have one head like that in the garage.. It has like a 50cc chamber and a 1.65 Intake and a 1.44 exhaust valve in it. They are junk heads except for the fact that they run you compression through the roof... the valves are way to small and very shrouded so by the time you put big valves in them and unshrouded them you would be back at 60 to 64 cc's just like the real 289 heads not the 260 carryovers. You can have the one I got if you want a boat anchor... it came off of a 64 1/2 260 car and edelbrocks went on it when the other head cracked.