yep Su-8 it is.
One of personal favorites - extraordinary plane. It carried over 1680 kg of armor, 2 powerfull engines M-71F could bring it to a speed at sea level to 485 kmh - with max speed at altitude 550 kmh. Climbing wasnt very good - but for such a heavy plane still exelent - 440 m/m. Ceiling 9000 m, crew of 2. It had 4 x 45 mm cannons - wich could be changed to 4 x 37 mm. 4 x 7.62 ShKAS wing mounted forward firing guns, additional ShKAS and 1 x 12.7 mm UBT gun top mounted. Su-8 normally would carry 600 kg of bombs, but up to 1400 kg could be mounted.
For some reason after after building 2 planes in 1943 and serial testing 1944 project was terminated.
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Best regards
Dmitry aka vfGhosty