I used to run 235's up front and 275's on the rear with street tyres on my 180sx and I thought it was fine. Did add a touch of understeer I felt, but I also had a much better quality tyre up the back which I felt contributed to this.
I bought F43O, paid for them, they they called me up the next day and informed me someone had "called before I ordered them and the site wasn't updated, sorry." Bullshlt....
Good luck with the sale, some nice plates there
I think very well indeed Troy, as the standing start hurts a lot in a RWD. I really struggle off the line, but can obviously gain in the rest of the course. The long wang is generally where I do best, running top 5 or close enough to. I do a lot better than on the short wang as I don't have enough track to claw the time lost at the start.