Hey guys another for guy here new to this site. I jus completed a motor swap in my 1991 f-350 dually 4x4 reg cab over the early summer. I swapped a 460 out for an SD 534 motor. I know im gona get alotta flack from this one cuz everyone badmouths it for its horrible weight and powerband, unless ur using for wat i am using it for. One thing ill be doing with it is i haul 19 to 27'000 pound horse trailers (i know it waaay to much for an f-350) with it. The other is sled pulling. So there wont be much need to escape the powerband of that 534 nor the 3300 rpm limit it has. The more than 1000 pound weight i have hangin on the front helps too so ill hang less weights on the front also. Me, my local parts store and machine shop got together and rebuilt this giant. With 20 hours of my porting the intake and converting it to a dual plane design got us an extra 10 horses. The new valve polishing helped a little too i imagine. As for the trans to engine i was extremely fortunate to find a 4 speed school bus with a 477 in it and my np-435 bolted happily behind it. As for the clutch i ordered a new one as if i owned that same bus. As for the flywheel is where the fab came in to lathe a newtrans mainshaft to spline with the flywheel (alotta work and a nice chunk of cash) so it slips in nicely now. I am using a double disc hayes ceramic 13.5" clutch. Other than the intake porting i teamed up with my machine shop to have them do most of the light piston filling that we did to the N.O.S pistons. We got the valves at lets say for argument sake 6/32 from the fully open valves. As the truck sits now my dyn pulls were 302 hp @2600 rpm and 585 lb ft.of torque @1950 rpm. I mightve been the first guy to do this swap so ask me questions or give me advice

 

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Hi- Very interested in your project. What issues did you encounter with motor mounts, exhaust manifold clearance to steering gear, oil pan clearance, general room in the engine compartment?
I did something similar, only to a '65 F350, and had to deal with (modify) all of the above. Only used an original type Spicer 5spd with 4spd aux.