Hello, I have a 1986 Mitsubishi mighty max 2WD 5 speed. I believe it's the base model because it doesn't have power steering or A/C. I am looking to get more power out of it and possibly a big build and I had originally wanted to find a 6 bolt eclipse engine for it, but I was talking to a guy the other day and he said I could just replace the head with a DOHC and it would be fine. I am wondering if this would be possible and easily achieved. Would it be cheaper to just swap the heads or buy a whole new engine? And what would the compression ratio of my engine be? I believe my engine is a G63B. It's the original engine in the truck. any help would be appreciated. Thank you.