A local bloke has an 8" diff with 3.20 gears for sale @ $1,500. Said to be in excellent order and out of a 66 Mustang. My diff is also 8" but with 3.00 gears. Should I grab the one on offer, swap them and then sell mine. Looking for a little more grunt around town at the traffic light drags and don't mind a few extra rpm at hwy cruising speed. Tyres are 14/60/215f/225r