Hi Mr. Schmid-
What Egoman really meant to say was "Welcome to the Forum! We all look forward to your build log. And, while the 7.5 might be sufficient for a car as light as a Locost, wouldn't it be better to get the stronger 8.8 found in later model Mustangs and such?"
I'm pretty sure that's what he meant to say...
Hi and welcome always interested in a V-8 build. IMHOP I think the 7.5" will live a long and trouble free life in a locost. In general ring gear size determines strength and it's true side stepping the clutch will produce higher shock loads; still a heavy Locost is 1600lbs even w/slicks that's less than 1/2 what most 5.0 Must. run. I would look at other factors does it have the brakes, gear ratio, posi and is it 4 lug or 5 (wheel selection) lastly unsprung wieght has a greater affect in a lite car braking, handeling and ride. Besides if it works "YOUR A GENIUSE " and you already have it; if not an 8.8 will bolt in it's place. But never forget it's your build and it's supposed to be fun; do 1 thing at a time, the next logical step and it will flow. I hope this isn't to preachy. GOOD LUCK and keep us posted.