Which oil filter?

Wix 51515r with straight 30 oil, Brad Penn....the filter says not street use due to light filtering of the oil but that also means it flows better and that straight 30 oil needs it when the engine is cold.

I used to run not street legal 20-50 Val but they stop selling it, did not want any synthetic oil, so far everything is great, change the filter twice a year, around 3 or 4 thousand miles each summer with lots of freeway speeds now with 3,91 gears, 4,000 rpms for an hour and its happy happy and could go forever it seem.

I should get solid lifters for that 340, then I would not need to worry about a spec of dirt

I used to use K&N but thats more for 10-30 oil, the flow is more important, engine is rebuilt anyhow, that oil is clean enough...old old Mopar used to even recommend changing the oil filter every other oil change