dirtyhands

hello- I have a modified 1950 MGTD with what I believe is a 1600 crossflow. Its a nice build with cycle fenders, twin 40DCOEs, exhaust headers, racing windscreens, and a disc brake front axle from an MGB. I am looking for tuning info on the engine, The block casting number is 2737E 6015A, which I think means a 1600 Crossflow. It has a Lucas distributor numbered 41146A 1, Is this a 1600 crossflow? 2. how can I determine if its a high compression or low? 3. what is the correct dwell setting? 4. what is the best static timing setting? My best gas here is 91 octane I don't have the Cortina plate from the donor car. I think the engine swap happened in the 1980s Any assistance is very much appreciated