Heh, hard to say
Best I can think of is to use kinetic energy to see if the two weapons generate similar recoil - speed ^2 x shell mass I believe.
That Skoda fired a 42kg shell at 580m/s.
The Persian 130mm fires a 30kg shell. The MV on the French 130mm DP was 840m/s, so lets say thats the Mv.
So to produce the same kinetic energy as the 149mm, that 130mm shell would only have a MV of 686m/s,
Hunting around, if you have an 8" how chassis about, those all look all 'safe'- even the British 8" to 7.2" conversion
If you don't, either Persia alone or with SATSUMA assist should be able to make a carriage- maybe use the Italian Obice da 210/22 as a baseline?
Oh, and for an example of the difference in weights between guns and howitzers, the German 150mm FH 18 comes in at 5612kg in action, while the 150mm Kanone 18 was put on the same chassis (but was overweight and had to be disassembled for transport) and ran 12,460kg in action- over twice the amount. Great range though