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i think the curb weight of a stock bronco is around 4500lb. its current weight i dont really know but might still be 4500. once you upgrade from an 8.8" to a semi floating 10.25" axle, but then convert drums to discs. put a winch on the front, but go aluminum cylinder heads. put somewhat bigger tires on but remove the spare tire and rack. so now its probably around 4500ish. but when i swap to a full floating 10.25", swap the front to Dana60 outters, put bigger tires on it, and possibly abit more lift, it will probably be around 5000. if i decide to go 35s, it would be normal mud tires on aluminum wheels so not too much heavier. but if i go 37", they are heavy military tires with very heavy steel recentered double beadlock humvee wheels, they are 170lb each.
my 90 F250 is just about as heavy but i went a different approach. its just a mild 302 with a E-street heads, mild cam (Comp 35-512-8), 1.72 rockers, GT40 intake, long tube with dual 2.25 exhaust. has a 4R70W with 4.56 on 33" tires. its running Explorer 5.0 EFI with tuner and i gotta say the thing is amazing. the thing really takes off good, much better than the bronco. gets decent fuel mileage if i can stop my lead foot. my only gripe is i wish i had gone 4.88 or 5.13 gears. i do occasioanlly use it to tow my 3rd offroad only truck to events and it struggles. i originally wanted 4.88 but choose 4.56 thinking if i do have to tow with OD off, i dont want the rpm screaming. but with 4.56 it really doesnt like towing over 60mph in either mod. had i gone 5.13 then it would tow much better with OD on and been alot more fun. but theres always room for making it a 347 and putting the AFR185 heads on it.
my 90 F250 is just about as heavy but i went a different approach. its just a mild 302 with a E-street heads, mild cam (Comp 35-512-8), 1.72 rockers, GT40 intake, long tube with dual 2.25 exhaust. has a 4R70W with 4.56 on 33" tires. its running Explorer 5.0 EFI with tuner and i gotta say the thing is amazing. the thing really takes off good, much better than the bronco. gets decent fuel mileage if i can stop my lead foot. my only gripe is i wish i had gone 4.88 or 5.13 gears. i do occasioanlly use it to tow my 3rd offroad only truck to events and it struggles. i originally wanted 4.88 but choose 4.56 thinking if i do have to tow with OD off, i dont want the rpm screaming. but with 4.56 it really doesnt like towing over 60mph in either mod. had i gone 5.13 then it would tow much better with OD on and been alot more fun. but theres always room for making it a 347 and putting the AFR185 heads on it.