150 Su-7BMK - earliest date of delivery found in Internet is 1968 (now 1/67), however according to a Polish monograph article on Su-7 [nTW 2/1997], first were delivered in 1972. It could carry 4 x500 kg bombs (now 4x250 kg). Better icon is 2158 - Iraqi Su-7 wore a camouflage (pictures
http://wp.scn.ru/en/ww3/a/271/19/0 )
151 Su-7BMK - usage from 1968 (or 1972) and icon - see above.
152 Su-17MK-4 - should be named Su-22M4 (export version of Soviet Su-17M4). In addition to guided missiles, it can carry 2-4 bombs 250 kg.
154, 155 Su-20 - better picture of Su-20 (although Polish) is 29126 - current one 11152 are later Su-17(22)M3/4, with a "hump" behind a cab.
156 Su-22M-4 - now available from 1/74 - it should be in fact earlier model Su-22M (production of Su-22M-4 started in 1983). I don't know when Iraq received Su-22M, but they were produced and exported from 1979, so 1/79 should be earliest date. In addition to missiles it could carry eg. 2x250kg bombs.
Iraq could also use Su-22M with 1 Kh-28 ARM (weapon #209 in Russian oob), used from some 1984 to some 1997.
Su-20s have radio RF, Su-22s - laser RF
251 L-29 Delfin - it's very doubtful, if it could carry 250 kg bombs - according to Czech page
http://forum.valka.cz/viewtopic.php/t/6443 , 2x100 kg.
Michal