Most REBUILDERS of volvo parts are up to speed on the necessary quality of the cores they rebuild, some will put just anything back into the market. FIRST and FOREMOST before you put your hard-earned money on the line, GIRLING placed a cast-dimple at the bottom of each "half" of the front calipers. Mis-matched, incorrectly rebuilt front calipers will have a dimple at the bottom and a dimple at the top. The resulting internal

cross directed hydraulic pressures will cause "weird failures" of an otherwise sound brake system.... remember a 240 volvo without ABS...has 2 separate hydraulic systems. SECOND take 1/4 and 5/16 wrenches with you to the parts store make sure the 3 bleed screw threads in the caliper

are "capable of holding the bleed screws", and while your at it, a visual inspection of the seats in the caliper is a good move. Occasionally a volvo owner/mechanic will break a brake-line as it enters the caliper, REBUILDERS have been known to ruin the caliper threads when they remove the broken flair-nut from the caliper body, so you gotta look there also. ONLY INSTALLING AND BLEEDING THE BRAKES WILL PROVE THE "NEW CALIPERS" WORTH THE TIME AND MONEY. This if from my "been there, done that file" larry