Originally Posted by 50adrod
Originally Posted by bigbadswingdaddy
41 cab is about 2 inches longer than a 40 cab. Dashes, doors, windshields, interior tin, and rocker panels will all interchange.

What specifically are you looking for?

where did they get the extra length from? the cowl?
thanks

The firewall is pushed foward about 1 1/2". The cowl and everything else is the same.