Need info/help on a 340

you need to get more info from the seller what pistons and compression ratio is it?

if the engine needs 100 octane fuel the compression is to high for a street car, it sounds like a race only motor, you could de tune it, only thay will not be cheap

here is a link to ultradine/bulet cams you can contact them to find the specs

http://bulletcams.com/index.shtml