Heater System Upgrades....

[elks]

For years my system has seemed a little weak and barely able to keep frost off wundows etc. The heater core finally started leaking and is going to need replaced.

While I am in there I want to do all I can to make the blazer warmer for my winter hunting etc. So is there a good existing thread? Or atleast a list of thing to fix and repair?

It is a 1972 Blazer without A/C.

Thanks