Type 1 oil pump in a type 4 motor

[Ron Maxwell]

My first post. I'm having a 914 2.0 motor rebuilt. I want to install a type 1 oil pump. I have viewed the video on rebuilding type 4 motors, in which a Gene Berg 26 mm pump type 1 pump is used. Now my questions? Can a larger 30 mm pump be used? I was also interested in using a Gene Berg Pressure relief valve. I want more filtering potential and have a MoCal oil cooler in the front of my car. Now I'm using a mocal sandwich plate with a thermostat built in. Whick I don't think is the best solution. Yes, it gets the system working, could the pressure coming off the pump be a better solution? I run my car in DE and autocrosses in Colorado in the Porsche Club.
What modifications do I have to do to make the Type 1 oil pump work? Is it worth all the changes?
Thanks,
Ron