my SR black top developed a bottom end knock a couple of weeks ago on a drift day, i've stripped the engine down and its spun a bearing on one big end. I need to get the crank re ground or replace it along with one rod my main question is where would people recommend to buy new bearing shells, seals, gaskets etc? i'll also need to replace the oil pump by the looks of it is anything worth upgrading whilst i am rebuilding the engine? bearings, head gasket, head bolts/studs? i see mentions of upgraded rockers or rocker stoppers? are there any common issues with SR's that can cause this? i assume its from a lack of oil pressure/surge but i dont know for definite, is a baffled sump worth looking at? i've also read about people adjusting the relief valve in the oil pump to increase the pressure? I'm new to these engines it'll be the first full engine rebuild ive carried out so any advise or suggestions would be great!