Randy,
I guess that Sanderson still has a bit of a quality problem -
If possible, take some photos and post them - probably on a fresh thread or, better yet, start a journal(I wish I had, but delayed joining the digital camera revolution until SLR's got reasonably priced). Possibly would be a help to others that for whatever reason, choose to keep the original frame on their '30s vintage street rod.
Take your time with the firewall - not sure whether the '37 is fully welded in but think it is, but you will probably have some minor body repairs around the edge as well. Might consider photo documenting this as well - again, should be interesting to others that will be trying it.
I just finished cleaning out the driveway with my baby diesel tractor and snow blower - we ended up with 12-14 inches of wind blown, 20 degree weather, snow. Next weekend, we will be in your part of the world - to see how the Left Coast "suffers"

in the winter time - business trip.
John's ride to the cemetery, his beloved Billings OK bus, The Baby Elephant!! Traveling in style!! As his service was starting I couldn't figure out what the music was, heavy on a flute in a jaunty...
John Norton aka johnboy