Thanks for letting me join the forum...I have a 1957 FC150 with original F134 motor and T90 Transmission. Just installed a new clutch disc, pressure plate, throw out bearing/carrier and pilot bushing. Parts came from Autozone, they had free overnight delivery, and look identical to what came out...With pedal pushed all the way in clutch will not release allowing me to put it in reverse or first. I even used channel locks and turned the bell crank as far as it will go moving the throw out bearing and pressure plate fingers as far as they will go, and it won't release. The old clutch worked fine, I only replace it because I was in there stopping the oil leak from the tranny input shaft cover. Found there was NO seal, or remnants of a seal, under the cover. Replaced cover with a new one from KW with the neoprene seal...The flywheel looked good so I degreased it and polished it with some fine emery cloth. The new pressure plate face didn't feel sticky or appear to have any thing on it so I installed it as it came out of the box. Any ideas why my clutch won't release? Disc is installed with correct side to flywheel...And are you supposed to have the tranny and bell housing installed to engine and put the throw out bearing fork thru the inspection hole in the top of the bell housing, or bolt the tranny and bell housing together, install the throw out bearing and fork and install the tranny/bell housing together to the back of the engine? I installed the fork thru the hole after it was all together and it took about 30 minutes of finagling to get in, grrr!...Do the adjusting bolts on the pressure plate do anything more than determine the distance from the 3 fingers to the throw out bearing when at rest? Doesn't look they would change the amount of pressure the plate has.