George,
How far from Boston are you? North or South or West?
I live in Kingston, Massachusetts. On the South coast near Plymouth Rock (next town over.) If you want help, just email me!
You can come by any Saturday or Sunday and I'll do the work for you/show you how to do it/help you do it, no problem at all!
I've replaced a TON of heater boxes and have had TWO TONS of problems with VW/Corvair exhaust fumes over the years. It's ALWAYS fixable and NEVER needs more than a few hours to straighten it out. I have cut off/reciprocating saws and welder and pipe bender and all so if there's something more that needs to be done other the the heater box replacement/repair, we're all set to go. I have a buch of extra gaskets and such as well, just in case.
Come by any weekend and we'll have some fun! Just let me know, and we're doing it . . . except the Saturday of the VolksVair show in Shrewsbury in a couple of weeks. You ought to go yourself. It's a great show in a greater setting. Ice cream buffet table . . . YUM!
TC