[TR] horns, battery poles

[Geo Hahn]

If your battery will sound a TR4 horn I think it should also sound a
TR3 horn.  The TR3 horn may be faulty or maladjusted.

I have seen batteries mounted both ways (posts forward and posts
towards the firewall).  To me the posts near the firewall are a neater
installation and look right.

If your eventual plan is to convert to negative ground then perhaps
you should do that from the get-go.  It is simple enough (takes
seconds) and while you're wiring you can connect the ammeter (and
electric fan if you have one) the opposite way.