Does Mace offer a memcal to suit my L67 VT Auto, running a 10psi pulley, pacemakers and exhaust?

Given your mods, we would have a memcal which would be compatible with your L67, provided it's in good working order and you're running 98 octane fuel. For further information about the product, please refer to the link below

http://www.maceengineering.com.au/epages/shop.sf/sec297c502008/?ObjectPath=/Shops/mace/Products/MEM611/SubProducts/MEM611