I replaced my th350 with a 700r4 narrow K case, the K case is from a 4 wheel drive and is thicker at the bell housing and only as wide as the engine block. The narrow case has way more room for the exhaust and my 700r4 was 5/8in shorter than the th350 i have so I still have the same drive shaft. I bought a stage 2 build from patriot transmission in July 14, hooked up my odometer for the first time and went from 28,000 miles to 92,000 miles with no problems. The transmission was $1,000. I saw it on ebay but called direct and even though shipping was free I drove to Ocala from Venice and picked it up. My 700r4 uses a tv cable that hooks to carb like the kick down cable like th350.