Just do it. 35 Whelen or AI, both are excellent rounds with modern bullets out to 400 yards at sea level (2000 fps, Barnes 200 TTSX) or 500 yards at higher elevation (8000', 2000 fps same bullet) with an mv of 2940 fps.
I've had a 35 AI for 22 years, 14 elk, 3 muleys, 3 whitetails and wouldn't trade the shootability or terminal effect for anything. Lots of experience with it and loading all bullet weights with many powders.
Touchdown88 shared this, and it's what I did. Had it built on an M98 action with a Brownells short chambered Shilen 35 Whelen barrel, 1-14" twist stabilizes even the old Barnes 250 X which is a LONG bullet. I split the cost of the 35 AI reamer from Manson (not much) with the gunsmith and he sure screwed that barrel on straight. Shoots fantastic.
It has a High-Tech Specialties stock (an early Bansner), all up in the field 8 lbs 9 oz with Leupold scope and 5 rounds in the mag, one up the spout with 200 gr TTSX.