X-flow tuning

[DavidP]

I own a live axle Caterham (circa 1988 build) fitted with a dry sump 1691cc x-flow. I believe it puts out just short of 130bhp. I am about to get some modifications done to improve the power (ideally 150-160 bhp). I intend to gas-flow and port the head (to the extent that it's not already done) and fit a race exhaust and increase the size of the radiator.

Does anyone know of any tips and tricks with this engine that I should bear in mind?

Thanks in anticipation.

[DavidP]

Thanks Bertie
Anyone know what a Filter King is and does?