Hey Dan,
The best person to speak to about this is a guy called Shaun Urquhart who has rallied a GSR Lancer.
[email protected]
http://www.rallysport.aust.com/gonebush/index.htm
GSR
EVO I
There are some vids and pics in there of his GSR rally car.
He told me in the past that the GSR makes a fantastic rally car for gravel events due to its smaller turbo, and nimbleness of the car.
The drivetrain in the GSR is as good as whats in the EVOs apart from say the Steel selector forks in the EVO and the possibility of an LSD diff.
Parts wise everything can be bought from brand new from Mitsubishi, not that a lot of the parts would be usable. Suspension wise you would use DMS stuts or the like. There is a limit on the level and type of modifications that are allowed in the ARC and most state championships.
Cheaper to repair than an EVO, and as both run 34mm restrictors the net effect on the GSR is less due to the smaller capacity engine. As quick as an early EVO if driven properly, and even as quick as some of the later ones. GSR is quicker down low also when compared to the EVO.
The HP associated with an EVO Rally car is useless in events under 160km/h, it actually makes the engine work harder than necessary.
I was in a similar situation a while ago so I contacted Shaun and he was able to talk me through the pros and cons of a GSR as a rally car as opposed to an early EVO. His main point was to go for a 'prepared' rally car rather then to do it yourself. There isn't that much saving to have, and you don't generally get a spares package with a car you prep yourself.
A preped GSR would cost around $35 000 compared to a good EVO of around $45 000 - $50 000.
Hope this helps
Mimmo