VCCA Home Forums TECHNICAL - 1945 AND EARLIER 1937-1945 '40 chevy heat riser

The original heat riser in my 40 master deluxe had been "jamed" in the open position for God knows how long and as a winter project I was going to take it out and replace it with a shaft and bi-metal spring from chevy of the 40's .I just got the old one out today and noticed that it has "bushings" on it where it fits into the exhaust manifold( the "new " chevy of the 40's shaft dosen't )the new shaft fits aprox. 10 thousands loose --that seems too much .Any suggestions ???? I assume the "old" one is the orginal but really don't know for sure .My car was one of the first mfg'ed has a chalk date under the dash panel of 11/39 ,if that makes a difference

the original did not have bushings-some one was in there before.They were not real tight when new but .010" sounds a little excessive.
1940 Production began in early Sept. of 1939 so your is just a "little" early.... :)

Again Gene --thank you .I've got a friend in Chicago that ownes a metal shop and I'll ask him to do a little metal turning for me ,again thank you for your help.