What are the chassis dimension difference, I am deciding on a crossmember to get for my 58 f100. Most kits are for the 53-56 like heidts. they dont offer the kits for my truck. Are the chasis similar. I measured mine in the front and its 34 to the outside of the chassis and 29.5 in the innner of the chassis. Does any one have the measurements for the 53-56 chassis. Thanks in advance!

 

It's a mess, but maybe something will work for ya here. Pretty much all pickups are 34" on the outsides ('52 and earlier were 32") up front. The insides may vary due to being a 4x4 or 2wd, etc... IE, how wide the rail itself is.