Jay
The lowest cost route is to find a Ford 2.6-6-cylinder, they are powerful but heavy, a Bristol engine will cost at least £10,000 to buy second hand & probably £20,000 + to bring it to a good working condition.
A new AC Weller engine will cost between £20,000- £ 25,000 for effectively a complete new engine.
If you want more information visit '
www.ac-engine.com' where all the basic information is, i try not to use the Forum as a sales tool though!
I am building a new engine with aluminium head, high lift cam & rockers this year to fit into an Ace Chassis & will then be able to give some performance information, i do expect this engine to be competetive however.
Several of my blocks are doing well in competition mainly in Frazer Nash cars so far.
If you want more information after visiting my web site please 'E' mail me.
Robin