b'Mounting Hardware and PartsToll-free in USA: 1-888-STEER-USInternational: 1-307-472-0550E-mail: sales.woodwardsteering@gmail.comFIREWALLBUSHINGSwithsteelFirewall Mini-Bushing flanges,aluminumballandDelrinsleevearedirectreplacementsfor3/4inchindustrialflangebearings.with 3 bolts SBC12-3.51.26with 2 bolts SBC12-2.51.26NEWLIGHTWEIGHTMINI-BUSHINGisallaluminumwithaDelrinlinerandafull-floatingball,sealedwitho-rings.Veryhighoperatingangle;requiresa1.50hole.SBC6-2.68.57SBC12-3 SBC12-2 Bushing bores are sized for the SL17 SBC6-2 and SL20 shafts below. Please specify if they will be used for 3/4 tubing. Install on one side only of the firewall sheet SPLINEDLOWERSHAFTSfitallWoodwardcolumns. metal; do not sandwich.Retainedbyaspringclip,theshaftcanberemovedfromthetorquetubewithasharppull.SL2057.26SL1753.36SL1549.46 SL20SL17Note: NASCAR rules require the u-joint to be outside the fire-wall. The SL17 and SL20 extend beyond the boot far enoughSL15to pass through the firewall bushings shown above; the SL15 does not (check your rules before ordering).Assembling an intermediate shaft: Asshowninfigure1onpages5and8,virtuallyeverycarbuiltwithrackandpinionsteeringrequiresanangledintermediateshafttoconnectthesteeringcolumntotheinputsplineontherack. Averyconvenient(andmechanicallysound)waytomakethisiswithupperandlowerU-jointsandasplinedshafttoconectthem.Splinedshaftsareavailableinvariouslengths,premachinedononeendwithgroovefortheU-jointsetscrewstolockinto,andtheotherendleftforcuttingtolength. Forverylongshaftsitmaybemoreconvenienttoweldsplinedstubs(shownatright)intotheendsofasuitablelengthofsteeltubingasshownbelow. See the Universal Joints section of the catalog for detailed descriptions and prices of these and other useful steering shaft components.Circumferentialweld1/8root 3/4ODx.120wallRecommended welding procedure: ER80S-D2 or ER90S-D2 wire with 75%Ar/25%CO2.50 Plugweld(optional)2X1.50(ref)12'