I Have done a quick search and cannot find my answer. Will a 1979 FJ40 Cowl (firewall) install to a 1961 FJ40 without a lot of modifications? My 61 FJ never had a heater and I have access to a 79 at a reasonable price complete with heater and windshield frame. I should be able to modify floor pans if necessary. Just not sure about width and connections being the same. I would appreciate any help.