Quote:

the 284-484 wont make enough vacuum for power brakes. Its 248* @.050" and ground on a tight 108 lsa.



Agree... much over 230 to 235@ .050 in a 340, especially with tight LSA, isn't going to make enough vacuum for PB.

One member mentioned a lower duration purple shaft that would likley work, there are other options. What are your goals?