[KraMax]

Marcello
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Whence at you such data on SU-7BMK?
Su-7BMK - It is made on the basis of Su-7BKL. Su-7BKL - the quantity of fuel is increased, the design is changed, equipment EW etc is added.
Su-7BMK - Had 8 hardpoints. Su-7BMK - differed from Su-7BKL older equipment. The truth is written that Egyptians without the permission - modernised Su-7BMK and have increased quantity hardpoints to 8 pieces. Then the USSR and made them with 8 hardpoints = 3300 kg.
Usually on all series Su-7 - 2 fuel tanks were established only. About 4 fuel tanks I have found nothing.