Hello, I currently have a mid 70s (I think) 350 in my 88' c1500 W/T which is my daily. I recently bought a built 700R4 for it as well to have the OD for highway fuel millage. I came across a carbureted 90-91' 454 casting number 10069286 for under $1,500CAD, and was wondering if a swap would even...