[twin plugged targa]

As mentioned before , I am looking at an 86 RUF engine/tranny converted car.
Were there different specs for their convertions or were they all the same/similar?.
I know it was a 3.4 displacement increase
Does anyone have details of the other specs the car may be built to?
Pistons/cylinders? Compression ratio?
Cams, Turbo? other diferent specs?
Are there HP/Torque figures published?

I also had issue with insurance and modification.
I did not offer the info but they did ask and were not prepared to insure a modified car.
So any help with RUF friendly insurance companies would be a help.

Many Thanks
Ben