Yes it will fit right in there with no modifying.
Yes, you sure can.
yes like 350 engine
Yes they interchange
305 horsepower
Yes they will. I have 305 24" wheels for my 01 Tahoe. They fit well.
235 horse is stock on 98 305
Yes.
Should be the 700R4
it is a 700r4
.035
The timing on that year engine is computer controlled. It requires an engine scanner to set the timing. YOU CAN NOT USE A TIMING LIGHT.
If it has a 305 around 15mpg If it has a 350 13-14