Larry, I moved the passenger side horn forward the width of itself and moved the driver's side about 3/4 the width of itself. You can move the passenger side further ahead because you don't have to worry about steering shaft clearance. I then welded plates onto the mount of the horn, then tacked in a captive pin style GM motor mount. I've got about 3-4" clearance from the HEI to the firewall and have radiator in stock location with mechanical fan and four groove pulley on harmonic balancer. Plenty of room in these trucks. Yes, I used a deuce tranny, 3053A model from behind a multifuel engine. 3053A have a 15% overdrive in them. The older yet standard style REO deuce trucks had gas motors with a 3052 non overdrive tranny. Skip them, as you're not gaining anything but weight. I made up a rear tranny mount and set it right on the factory 715 tranny mount on the stock crossmember. It's a hefty tranny that surprisingly fits well, but will require some fab work.
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