Thats great then, Just over fill the oil a little, Check your brake pads and put new brake fluid in it and away you go!! Everyone has different opiouns about the oil issues RB26 can have..If you spew out oil over the day just check the level and top it up a bit more...Do you have a oil catch can fitted?
Street tyres will be fine if it's your first go just need to get some heat into them