In my NOT-SO EXPERT opinion,I'd go with "Patrick's" gears. They're a great bunch to deal with,and they are NOT out for the money! They're fellow "Bolters",and they stock everything from complete rear-ends,5-speed transmissions, springs,brakes,as well as an assortment of stock engine performance goodies. Go to the link page,and e-mail them for a catalog. You'll be glad you did! I wanted to do an oil-filter installation/up-grade on my 261,since it is an origional "S.C.O." engine. No oil filter.(Oil is filtered through the oil-bath air cleaner). Instead of trying to "Sell" me a filter-installation kit,they actually talked me out of it! That saved me over $150.00!! I like these guys!!