I would check the pasn side engine mount to see if it has moved any. Are you buying the entire car or just a pull out? When I bought a 98 TA that hit a tree head on.....I found 2 very small stress cracks on the block. Everyone here at HBZ said it was an easy fix and another member here who has a LS2 in his Miata said his motor had almost the same exact crack. Also with the car tweeked like that, check the tranny cross memeber and where the input is for the driveshaft. Another thing to check which may sound weird but check the rearend for any signs of a crack. The 98 TA hit the tree so hard that it cracked the rearend case. Hope this helps. Also does the motor run?