I could use some advice on sustained speed /4, Open Road Racing Options

[StuK]

I just ran across a type or racing last night browsing the DFW Corvette Forums called Open Road Racing. If you haven't heard of it, it is an "across the desert highways" generally 50-60 miles in two directions. (From one town to the destination town, then when all cars are accounted for, timed back to the starting point)

This looks like killer fun. I have a C4 Vette but, I noticed that 70% of the cars that enter are Vettes with just a couple of Porsches and NO 914's.

I want to do this in my '74 914/4.

The class I want to drive is the 115MPH average speed class. I know my car reads it goes that fast but, I am worried about sustained speed, engine heat, I think it may be pushing the limits of the engines RPM range.

Would any of you experienced guys suggest a list of things you would do to make a standard 914 into a vehicle for this type of racing?

I have a 1.8L block built to something over a 2.0. My Dad had it built around 1988. It's running dual Dellorto 45's so whatever size engine goes with the 45 flow, that's probably what the engine size is.

My thoughts are (correct me on importance and please offer suggestions on the order of things):

Body and suspension:
sway bars (Fr & r)
air dam
GT spoiler
roll cage and (2) 5 points (wife will be navigator)
Do wider tires make sense or will it rob too many horses with the /4?
Should I run any fiberglass body panels? Do they make a big difference?

Engine:
External oil cooler
Anything else you guys could suggest?

Will lightened flywheel make a difference in rotating mass? Can you feel the difference or no?

I am in the 220# range, wife is 138#

I imagine you guys running track cars hopefully with a /4 have some experience you can lend to make sure I don't waste precious cash on unnecessary things.

I missed this years race local to me as it's actually tomorrow.

Here is a little video of a past race:
Big Bend Open Road Race 2010

Here is a pic of my 914:
(IMG:http://a1.ec-images.myspacecdn.com/images01/78/c1d6d54289908bb4b08f6bfa19b363b6/l.jpg)

Thanks fellas.
Stu