motor swap???

could you put a nissian 4 cylander motor in a mazda without alot of modifications?

If you want to put a motor other than the Mazda B or any other Mazda direct bolt on to the transmission bellhousing, you need the complete motor and tranny and you also have to figure out the motor and tranny mount location.
Practically anything can be done with time and money. Most practical way is to replace it with same model engine. There was a previous post here as to what other motors will be a direct replacement for the mazda B series.

thats the topic to go to

thanks I will check it out