Kidneybuster

That Mitsubishi was real crazy! My Suby is a shade smaller than L300. It's less than 12' long (with both bumpers and towing app)

Ever seen di crazy van? Japanese version is Subaru Domingo. I desperately need a Service Manual for it.

I don't think I'll be of a big help but anyway... I have 1990 Subaru Libero 1.2 carb. had similar problem last winter. Used hot-air gun to warm up the airfilter. It helped to start engine. Then I had replaced a few vacuum lines on a carb. There are about a dozen of those rubber lines less than a 1/4'' inside. Some of them were deteriorating. It solved a problem. See if you have some of those things. I have not seen your engine, can't say anything else.