I'm rather new to the topic of swapping engines so please forgive my ignorance. I've read a lot of posts and have yet to find a consensus on what is the all around best swap for a 4g w/ D16A6. By 'all-around' I mean: price, ease of swap, power, torque and future mods. I decided I wanted to keep my '91 Hatch as a fun, relatively street legal , non-race car; but fast & powerful too. I've 156k on this lil sucker and she still runs great but she's been worked...hard. I really don't think she's got much left to give. I haven't heard much good about D series anything. Sooooo, gentlemen, any assistance that you could provide would be greatly appreciated. In the meantime, other than increasing airflow ( intake, header, exhaust) are there any other tweaks ( not NOS or Turbo) that I can impliment to squeeze more power & torque out of her? Chip? Cam? Cam gear? Under drive? I don't want to do too much to the top end and lose the bottom before I can do the swap. Thanks in advance!