85 Chysler Town and Country

I have an 85 chrysler town and country with 113000 I just had the entire front end redone and drove it from michigan to georgia without any problems moved to tennessee and now after a month of just small trips to town the oil pressure is very high for the first 20 minutes of driving then it is normal then sometimes when putting in park it bottoms out and stalls the fuel gauge has also decided to start acting up going from full to empty instantly the last time it happened I stopped and got gas and had at least a quarter tank if not more. Other than the gauges and the sporatic stalling when shifting to park the van drives perfectly runs and idles fine.