Hi Deb, A warm West Texas welcome to the site! Your beloved Peal is indeed a Gem. Clipper is a nice unit. Good Job!
On manuals, This is a link to the Factory service manual. Ebay has them too, maybe for less, but a book from 1978 would be a treasure to find on there. It looks like there is an Electrical manual available as well.
I'm not familiar with the T S switch removal, but an Auto parts store may have a puller to lend. It's easy to do. I got one from Harbor Freight.
Good Hunting Enjoy your Van and Good Wrenching too! https://www.factoryrepairmanuals.co...ry-shop-service-manual-c-k-g-p-15-25-35/