Explosions - Toyota Land Cruiser, 4.5L, 1992

After accelerating for some time (gas to the floor) and then throwing gas in gear, explosions are heard. Like cotton from a good firecracker, people turn around 100m away. He hits his legs. There is already a hole in the front pipe, the muffler has also been torn apart. I went to the club today, the ignition was perfect, there is no distributor backlash. Due to the installed HBO evaporator in the air duct of the air filter, its (air duct) cross section was halved - the engine did not have enough air, as a result, the mixture was too rich. They threw out the evaporator, there was less shooting, but the problem did not completely disappear. They began to dig the carburetor. The throttle damper of the primary chamber did not work, it was repaired, it did not become easier. The economizer is suspicious. In general, the club makes a helpless gesture, a boy of dubious appearance from the CO-CH barn "swears by his mother" that he will repair any carb for 1500r.
Are there any other options? Advise a good master.