Ok im new here and as well have never rebuilt an engine but i got a free to me donor vehicle with atleast 100k miles under mine...mines running ok 250k+ miles a side so do i keep my well worn engine and build the lesser aged engine or slap seals and cĺutch in the new to me engine and driveit while building a beta 1 that can daily with over 12psi boost :-). (Hopeing 16-20) but will be testing waters at 12 and going up 2psi till 20 because i dont need to door dash any faster than that＼(^o^)/