Hi. K clubfit
The garage name is fountain-auto located on soi mahadthai ramkhamhang rd, you can call the garage at 02 539 7172.
Mazda RX 4 is rare in Thailand. From the photo it looks RX4 to me, but you can also easily check at the electric coil"s housing if rotary engine they must be twin coins.
The suitable engine for this car is either 12a or 13b depends upon the year of the car. If you want to change the engine back to rotary that would be the
best thing to do. I thinks 12a or 13b still avarible here.
Good luck krab :