toyota4life23

hey guys im new to this forum just got my truck so heres my first rig

its an 88 4cyl 4x4 reg cab runing 146k. Its got a 4inch suspension lift and i think 2inch body, its got 35s on the back and 33s in the front the head gasket and the clutch have recently been changed, it did make a noise and i had a friend thats experienced with 22re's take a look he said it was the timing chain and it needed to be replaced. Its got some body rust on the outside of the bed, its also got a hydraulic lift under the bed that tilts it. thats about it, im in the market for some tires the 33s have good tread but the 35s have like 20% left so when buying tires should i just put 35s in the back or 33s, also its not registerd so just out of curiosity how fast would it be able to go on the highway and what gas mileage am i looking at suggestions are great fully appreciated !

ide also like to know how much u guys think i should have payed for it or just its street value