Thanks for your enquiry.
I have had a look at this type of model and found a review of an 80" Eindecker (http://www.modelairplanenews.com/reviews/fokker.asp).

Assuming it is going to be similar to this model and under the 12lb mark, I would probably opt for an RCV90SP. This will not give you as much power as a Super Tigre 90 2-stroke engine (as the 90SP is a 4-stroke), however it should certainly be more than adequate for scale flying. The RCV90SP will turn an 18x12 2-bladed propeller, 15.75x13 3-bladed, or a 15.5x12 4-bladed, which should certainly give you a scale appearance and will look fantastic against the large cowl.

I hope this helps
Best regards
Laurenne