This thread is far out on left field.
First it sounds to me like its the wrong motor. May even be the wrong block, wrong crank, wrong pistons, wrong cam, etc.
Your gonna blow head gaskets if you detonate the motor. Having higher compression makes this easier to do.
You better research the block casting numbers, crank casting and assure its a rolled filet crank, and then go and see what pistons are installed into this mystery motor. Rods will have two dimples on them IF they are turbo rods. If you fail to heed these warnings.. eminent problems are guaranteed to happen.
TTA pistons are available from Johns performance. Not to say what was wrong with the original motor that you need to replace the entire motor?
Quit making decisions without having proper facts and documentation. So far the wrong motor was ordered, and the fix is to RIG the heads onto it.
The terms "rolled filet, turbo crank, turbo rods, 109, 229, 877, etc" are searchable on this board to educate. Hope you start digging now befire its too late.
FWIW, nobody sells a rebuilt TTA motor. The fix is rebuild your own. If you want things correct.
Lastly that motor they sold ya, does it even have a hole for the turbo drain on it