E30 318i M10B18 or M42/M44 for '80 316?

[ardaakbulut]

So I currently have a 1980 316 in process of restoration and while we are at it I wanted a little bit of extra power with it (130-140 crank hp, so basically 323i level). And due to the laws in turkey I cannot swap in a 6 cylinder sadly. So the best option looks like an m42/m44 but those need a fair bit of fabrication as far as I could find on the internet. So I thought maybe I could get that power out of an m10b18 out of a e30 318i. (No 2 liter m10's because they are quite rare in my country). So my question is can I make those power figures from that engine with cams, headers etc. without sacrificing daily drivability too much or should I just get an m42/m44 swap? (I also have the original engine if any parts are needed to be swapped onto the m10b18.)

[uwbuurman]

Easiest to go is the m10b18 engine. All fits well, like gearbox etc. But beware, you'll need to wire a different fuelpump and a tankunit. And some wires. Not sure if the fusebox can stay.

A bit harder to go is that m4x engine. You'll need a custom wireharnass, engine mounts etc.

[Sierpien]

An M42 is a bit more work, but it totally transforms the car.