I have an '84 K5 blazer 4x4 with a 350. It's never gonna see more then 300 horsepower or 35 inch tires. I need a new transmission. I will put 3/4 ton axles in it later, but for now it has 3.08s with 31 inch tires. The engine is stock(for now) so I need a low first. Should I rebuild my current trans or swap something else in? If I rebuild the current 700R4 in it, what are some upgrades to make it stronger? BTW, this is just a rig for hunting trips, bad weather and mild offroading.