That setup is very nice .
It will work just fine.
I do most of my 80 and can setups , with the engine rotated to about the 8:00 position.
This allows for a single header bend.
On The WH35%, I did this setup as shown in attached pic.
I would suggest the front IN and rear out can by KS- I think it runs harder - It does have a little more internal area.
If you can swing it - the full length KS80 pipe is even stronger - but in the WH35%- the setup can be too tail heavy.
In this plane - balance is a real point of concern with the 80 engine.
I moved rudder servo forward and stripped and recovered elev and rudder after removing all sheeting and cap stripping them.
For the prop -for 3D stuff - let the engine rev-
Tho the 80 easily spins 27x10 MenzS in low 6000range, it will perform better using a 26x10 Mejzlic and running upwards of 7000 on the ground.
This rpm depends on tuning setup you use.
Do not use a short tuned setup - the engine can get rough in mid range.
The WH35% with this setup can be under 27 lbs -
weight is the enemy of good 3D flying
So-- my suggestion is to exercise every chance to lighten everything aft the wing tube - tailwheel etc., then - if it gets nose heavy, change the landing gear to 2024 T3 in 3/16" thick, 1/2 as wide as original gear.
My plane flew very well with the 80
we shifted to the 100 NG as soon as one was available .
The performance difference is not a bunch over a TUNED PIPE 80 single.
but the weight stays further forward.
The plane shown on the RC Showcase opening page, is this same plane.

It is a very good performer.