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--></style></head><body lang=EN-US link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Michael</p><p class=MsoNormal>There was a slow switch from BSF to UNF fasteners used and threads on some parts starting about mid 1954 through the end of 1955 at several locations on the 100. However I can not speak to the engine mount to chassis fasteners. </p><p class=MsoNormal>Its one of those areas of the car that if I ended up with damage to the welded nut threads that could not be cleaned up with a tap I would do what was necessary to secure the engine mount short of replacing the welded nut. </p><p class=MsoNormal>Perry</p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10</p><p class=MsoNormal><o:p> </o:p></p><div style='mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal style='border:none;padding:0in'><b>From: </b><a href="mailto:rrengineer.mike@att.net">Michael MacLean</a><br><b>Sent: </b>Saturday, May 9, 2020 5:14 PM<br><b>To: </b><a href="mailto:healeys@autox.team.net">Healeys</a><br><b>Subject: </b>[Healeys] Motor Mout Bolts</p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Are the bolts that fasten the motor mounts to the frame different threads between the BN1 and the BN2?<o:p></o:p></p><div id="yMail_cursorElementTracker_1589058832618"><p class=MsoNormal style='margin-bottom:12.0pt'>Mike MacLean<o:p></o:p></p></div><p class=MsoNormal><a href="https://go.onelink.me/107872968?pid=InProduct&c=Global_Internal_YGrowth_AndroidEmailSig__AndroidUsers&af_wl=ym&af_sub1=Internal&af_sub2=Global_YGrowth&af_sub3=EmailSignature">Sent from AT&T Yahoo Mail on Android</a></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>