Sorry but another 318 cam question.

Definitely a good setup for the combination. If it helps any, I'm switching into a 2000 Sure-Grip Durango axle. The first gen Durango axle is 42 inches spring to spring perch and the perches are on the bottom of the axle tubes. I've got a set of Cass's (Dr. Diff's) excellent bolt in spring locators and shackles for 41-3/4 spring to spring width to make it an easy drop in. It would still fit okay on the 43 inch spring width, but I need the tire to spring clearance anyway. The Durango axle is 65 drum to drum, but could be dealt with enough wheel backspace/positive offset.
I'll be narrowing mine with 8-3/4 axle ends and some Moser axles cut to 27 splines, but only because I came into a set of reproduction Polyglas L60-15s on a set of E/T IV five slots on the cheap. It's a lot to go through in my case to swap for an 8-1/4. But being I already had most of the stuff on hand or was able to trade for other items with minimal investment, I'll still be in it for a lot less than a similarly outfitted 8-3/4.