7377FrameUpgrades
The 7377 Chassis upgrade sheet would apply to the 58-80 full
chassis cars in principle. the side upgrade could come further up on the
full size car.... up to the crossmember....the holes that are existing on
the front end can be enlarged without worry. This is to lighten without
losing strength & integrity..the holes were kept small to keep a large
margin of safety- a slight enlargement will still be well within safety
margins...