I'm new here too (89 Monty Sport), there is an 88 Monty in junkyard new here I am attempting to get-4 banger with 123k. Engine problems----maybe head? Man said he thinks the problem was in the bottom end?

I drove the monty 109 miles home, probably 90 of that was 65 or 70 on interstate and I only got 16 1/2 MPG with V6 and 5 speed, but I did put about 80 more miles local before I filled up and checked it.