Heat riser differences

[sam dupont]

Bought a pair of 68-70 HP manifolds. The heat riser is intact except for the weight. There appears to be at least two different weights for that time period, maybe more, but that's what you get doing research on eBay. Just curious about why the difference. Can earlier or later counterweights be used?

 

[Richard Cranium]

The one on the right is 1968 -1969 and the left one is for 1970 - 1971.

 

[sam dupont]

Thank you! Do you know if they function the same? Oh, very good. Are there any adults in the house?

 

[Richard Cranium]

They serve the same fuction, but the manifolds were different. I would tend to say that they are not interchangable.

 

[sam dupont]

Bad news for me, I can't read the date code. Thank you.

 

[Richard Cranium]

Notice the heat riser location....

68-69

70-71