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Message: <blockquote data-quote="Hopelessly-Devoted" data-source="post: 1590407" data-attributes="member: 28907">I have a t-shirt that says: “ There are three types of people in this world, those that are good at math and those that aren’t.”For those of you who may remember, I’m the one that accidentally dropped a bolt into an injector port and blew up my stock 302. That’s the bad news, the good news is it has forced me to finish my 351 swap. I have everything assembled and ready to go back in, but, I have run into a situation where I need a crank pulley spacer (expected) but finding the correct length has been troubling me. The highlights:351w best guess late 80’s casting (1987).Bored 0.040” overStokerAFR 185’s Renegade’s Edelbrock PerformerHolley Sniper5 speed manualSummit Racing SFI 28oz balancer SUM-C4269Summit under drive pulleys302 timing cover and water pump“Trying” to use the original accessory brackets (alternator, power steering, A/C & smog pump idler pulley delete).The details:Balancer mounting face to smooth idler pulley face is 1.75”. My first calculation based on measurements of the pulley told me I needed a 0.875” spacer, but I am still 0.375” shy of the pulleys lining up. No one makes a 3/8” spacer extension or any form of shim(s). I know I need to remeasure the pulley depth/offset and will get it in another day or two. Based on what I know from installed measurements I need a 1” spacer. The closest I have seen is 0.909”. It gets me very close but still not the exact number. Has anyone used this combination balancer and stock accessory brackets? Anyone know where I could get a 1” 4 bolt spacer? Do I use different accessory brackets? I would like to keep A/C but everything I have seen is for no A/C. Is there another/better SFI rated “factory” style balancer?I’m open to ideas and suggestions. Thanks in advance for reading & responding.</blockquote>