1975 Dodge Truck I own (Thinking of making a hot rod)

I would go 440 4 speed. I had a stock '73 440 out of a wagon in my '73 'Cuda that hauled ***. All you would need is a truck pan and mounts, 11" bellhousing and a 4 speed. I am sure there are many small parts involved too but way easier than dealing with a non stock 6 speed. There is a short box /6 O/D 4 speed truck near me for $1,500 and that I may do that to.