Originally Posted by Dave_J
I have seen so many of these 1972 up truck cabs with a 3 inch long 1/8 inch wide crack in the firewall in the wiper linkage cowl area. I think its a weak area from the stamping that has rusted out. My son has this issue.



of what you have seen is this in a spot where I could easily get my MIG stinger in there and fix the issue? Just thinking ahead.
Ive heard of this before, cracks in the firewall area but have yet to see one.... (I haven't had this issue yet, must just have been lucky/ so far)
haven't had a chance to check out this area on my truck yet though either.
My floor pans are like new so here's hoping that this isn't my issue.
good info anyways because I don't plan on this one being my :last" D/W series truck...

what causes these cowl/firewall cracks? I wouldn't think it would be cab/body flex, as they are full frame. If they were a unibody vehicle that cause would be more understandable.

In the case of THIS truck, I wouldn't think that its /6 would have enough power to "hurt itself"-- relating to body and frame flex....