Any bolters out there ever convert a small window (60-66) pickup to a big window. Im a pretty skilled bodyman and it doesnt seem that difficult but dont want to ruin my cab finding out it cant be done.
It's easy to do on the outside. It's the inside that makes it hard. I had to put a new roof on my 63 big window with a roof from a 63 small. I took the inside from the old roof apart at the upper seam and welded it into the roof of the small window replacement roof. I've never tried just a conversion, but I would bet money you'll have to find a donor to get the inside sheetmetal to make it look factory. Once you have the two cabs next to each other, the difference is obvious, Scott
The information below is an excellent source for the small to big back window conversion. Project Old School has many excellent technical articles for the '64-'66 Chevy trucks.
Thanks to everyone who replied...my 65 big window cab is so rusted out i dont know if it can be saved and it sure is easier to find doner cabs of the small window flavor...I guess ill see what i can do...thanks again