I finally got back to look at my truck last night. Wow. There is NO counterwieght on the heat riser! It was rusted in the closed position. I guess the little coil spring closed it when it got cold, and since I haven't run it in a couple of years, it just rusted shut and stayed in that position. I freed it up with a little PB blaster and clamped a vice-grip on the shaft and it is totally free now and runs much better. I don't know how I missed that when I rebuilt it, but I did. I have another intake/exhaust manifold from a '49 that has the complete and working heat riser. I remember not waniting to use the '49 on the '41 because they are shaped a little bit different. I like originality. I know they would bolt up though. I am guessing that the '49's shape might have been a little improved from an airflow standpoint. I got it on my mind to sandblast the '49, paint it to match the '41 and put it on...or, I could maybe attach the counterwieght from the '49 onto the '41. The '41's shaft only sticks out about 1/4" and it is kind chewed up from the vice-grip teeth ( I am apparently not the first person this has happened to.) What would you guys do? Jim
