try to get all the rubber plugs for the floor and fender rails in the front, they rot out by deezal isspray serviss. also get some dynamat sheets to stick inside the rear fender and door skins, toyota used tarboard but you can improvise with dynamat sheet. dont need to cover every inch - just a 12x12 pc would be enough.
and for the love of God do not try to convert to rack and pinion steering, you do not have the measurement neither the tools to calculate the steering angles, even pro fabricators get it wrong 80% of the time.