There are too many differences between Spain and Thai and will make it too complicated. Celtic Automotive Centre in Bayswater are a Wrecker and repair workshop. They know all the differences between Thai and Spain Navaras and what bits are interchangeable ... which are very few! The bare engine might be the same so ask them as they'll know.
One of the Mechanics at Celtic makes up reconditioned YD25 engines that are sold for about $6,000 exchange, so that's an option for consideration.
I've bought quite a few parts from them over the years, especially after hitting a kangaroo 300km east of Newman back in May 2019. I've always found them easy to deal with and pretty helpful when it comes to the nuances between Thai and Spain Navaras. There are so many subtle differences in parts you have to be very careful ordering anything or you'll be caught out.
Any YD25 from a Thai built D40 of any trim level will drop in.
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There are plenty of Thai D40 YD25 available on the east coast. Freight is about $400
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