that depends on the type (heat range) of your silver solder check w/ your dealer and temp range of the distance your piping is to heat. I do not believe you have to worry when using H2O heat and the lines can look strikingly good if the execution is done well. http://home.twcny.rr.com/schickling/1940Chevy/rebuild6.html
Gooday
Caroline & Jim
& Lucinda our 3104
51-3100 inliner @ 4655
small wheel moves by fire and rod,
big wheel moves by the grace of god,
every time that wheel turns round,
bound to cover just a little more ground.
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