yes I too am gaining 5 pounds of oil pressure when hot.I think that this is a great idea for the NA motors.Its also nice to have a spin on filter. This was olivers 1st failed try to help out the turbo charged 310 in the 1855.It may have helped them but not as much as the block replacement with the built in oil cooler like on the 1950-T &amp; 1955. May be we will get some feed back from the old pros of the day who worked in the dealerships at the time That this TSB or field up date came out.