Not to help get off subject of your part for sale. But I agree with you. My 540 BBC has a MSD dist. that is locked out and doesn't have a vac. advance.
The motor has 32 degrees timing all the time. I use 93 octane from whatever gas station. 1000's of miles and no problems. 704 h.p. and 15 mpg.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SuperNovaSS</div><div class="ubbcode-body">Thanks for moving this post to the top. I don't understand the reason for your post. 11:1 compression will not work with today's gas either. Also, can you explain why this vacuum advance will not work with today's gas?
Jason </div></div>