I forgot about the rear...
Yes, you want to stay away from blocks. I had a set of springs made in Canada at Carrier Spring Service a few years ago for one of my trucks. I couldn't tell you the difference between the '76 F100/150 rear springs though. I am a big fan of shackle flips and that can get you an additional 2-3 inches of lift without spending any real money (8 bolts).
Don't do add-a-leafs, as your ride will suffer substantially and you won't get any real height gains out of it.
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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