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There are basically no external differences between a 305 and 350 (year-to-year differences, but not 305 to 350 within basic year ranges). So, no, there wouldn't be any differences because you're putting a different engine in.
Opinions vary, but I prefer pulling engine and transmission together, especially if both are being changed. If you will be reusing your current transmission, then it could be argued that leaving it in the car is easier (especially if you have a really long extension to get at those bell housing bolts from underneath the car). |