I'm working on the ST300 in my 65 Gran Sport and have a question..(Paging Tom T.....!) Making modifications to the high clutch feed shift pressure and shift RPM per the "Blueprinting Buicks For Action" article from '66 (?) Because I dont trust myself, anything I modify is an extra, and all the original parts will be preserved. I modified the governor to increase shift RPM -The article calls for removing one spring and drilling 4 1/4" holes (!) in each flyweight to arrive at a 5500 RPM shift point. I'm looking for maybe 5000 - 5200 RPM, so I drilled a single 5/16 hole in each weight and left both springs in. It's likely gonna be a trial and error process, so I'm starting slow. I found the high clutch feed hole in the valve body plate, and openened it up from .090 to .125, which should speed and firm up the shift (It's lazy right now, probably costing me a tenth) But now the question - talking to Tom, he said to pull the front pump pressure spring and either shim it or stretch it. I'd lean toward shimming it, but I cant tell if the snap ring retainer is accesable through the pan opening. Reading the manual, it looks like I'd have to pull the torque converter and them pull the pump out of the case to access it. Is it accessable through the bottom of the case? I havent dropped the pan yet so if it is, is it on the drivers side or passengers side of the valve body? You out there Tom? Thanks, and wish me luck!