Thread: BB GM Heat Riser # 3940977
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Old 11-15-2013, 04:05 PM
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Default Re: BB GM Heat Riser # 3940977
Since this was brought up again I did some research on the valve with number 3746844 on the weight. It seems that the 844 number is just an I.D. for the weight and is not related to what the valve fits. The same weight is used on some 2 1/2" big block valves and some 2" small block valves. Back to the drawing board on this one. I think maybe I'll just put my 2 1/2" valve on ebay with an accurate description and send it to a new home.
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