<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Hi Simon,</div><div>The later HIF44 SU carbs are already tapped for an air cleaner, so I don't see an issue. </div><div><img src="cid:6DF102C3-6A29-49F0-BB03-068B2E9DC730" alt="image1.JPG" id="6DF102C3-6A29-49F0-BB03-068B2E9DC730"><br></div><div><br></div><div>I'm running this on the HIF44 on a 1275 A Series for my Austin A35 Van project </div><div><br></div><div><img src="cid:B523BB9D-1D4A-4D5B-A000-D05AE6CEF7D0" alt="image2.PNG" id="B523BB9D-1D4A-4D5B-A000-D05AE6CEF7D0"><br></div><div><br></div><div><br></div><div><a href="https://www.med-engineering.co.uk/med-hiff44-stub-stack-system">https://www.med-engineering.co.uk/med-hiff44-stub-stack-system</a></div><div>Best</div><div>Chris <br><br></div><div><br><div><br><br>Sent from my iPhone</div>On 23 Nov 2018, at 1:15 am, <<a href="mailto:simon.lachlan@alexarevel.plus.com">simon.lachlan@alexarevel.plus.com</a>> <<a href="mailto:simon.lachlan@alexarevel.plus.com">simon.lachlan@alexarevel.plus.com</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=us-ascii"><meta name="Generator" content="Microsoft Word 15 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal">I’ll be removing my carbs soon in order to achieve clearance for raising (the front of) the engine. (Harmonic balancer installation).<o:p></o:p></p><p class="MsoNormal">So, it struck me that I may give my 3 HD6s another go. Swap them with the current setup.<o:p></o:p></p><p class="MsoNormal">Thinking it through and looking at the big box of bits, I recalled what a pain it is to get the nuts and two washers onto the bolts that hold on the air filters. I have French manufactured K&N lookalikes. The bolt starts inside the filter, goes through the carb and gets two washers and a nut. Very awkward to deal with those nuts and washers. PITA.<o:p></o:p></p><p class="MsoNormal">I thought that I might put in helicoils then I thought “Why not tap the holes?”<o:p></o:p></p><p class="MsoNormal">The holes on my HD6s are 11/32” or 8.8mm.<o:p></o:p></p><p class="MsoNormal">I am no engineer but it seems to me, from looking at tables on Google, that I could use a 25/64” drill bit and tap them out to 7/16”. I have both the drill and the tap but would like some expertise applied to the issue before I start drilling.<o:p></o:p></p><p class="MsoNormal">Any input would be much appreciated.<o:p></o:p></p><p class="MsoNormal">Thanks,<o:p></o:p></p><p class="MsoNormal">Simon<o:p></o:p></p></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Support <a href="http://Team.Net">Team.Net</a> <a href="http://www.team.net/donate.html">http://www.team.net/donate.html</a></span><br><span>Suggested annual donation $12.75</span><br><span></span><br><span>Archive: <a href="http://www.team.net/pipermail/healeys">http://www.team.net/pipermail/healeys</a> <a href="http://autox.team.net/archive">http://autox.team.net/archive</a></span><br><span></span><br><span><a href="mailto:Healeys@autox.team.net">Healeys@autox.team.net</a></span><br><span><a href="http://autox.team.net/mailman/listinfo/healeys">http://autox.team.net/mailman/listinfo/healeys</a></span><br><span></span><br><span>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/healeys/austin.healey@gmail.com">http://autox.team.net/mailman/options/healeys/austin.healey@gmail.com</a></span><br><span></span><br></div></blockquote></body></html>