Quote:
Originally Posted by Rocky 389
Bill...I'd be willing to bet the 58 heads are thin adjacent to the spark plugs and exhaust valves and therefore needed the dist.tubes. Later heads didn't suffer from lack of tubes and just to compound the issue, the later heads received heated water from the lower block......early heads received cool water from the radiator.
The plot thickens...
to be continued................
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Rocky:
The water distribution tubes had four holes evenly spaced (one per cylinder) and four more that exactly aligned with exhaust valve spacing of each cylinder.
PH:
The 62 heads will bolt on to the 59 block as will the 59 front cover, and I'm pretty sure early inlet pieces will attach to the 62 heads. But the coolant flow from the later block will not line up with the early front cover. Larry Gorden has good pictures in an article at
http://www.pontiacsafari.com/ then click Pontiac Info and then click Pontiac Engine Cooling.