thanks Rich,   finally.  I know what a Y block is, and FE

The heavier oil should give a higher pressure reading, though if it's been in there a while and is "well used", that could account for the difference.
If you're interested, here's a link to an article by Ted Eaton where he does some comparisons of heavy vs lighter oil and their effects on power:
oil article

No sir, your 312 is a "Y" block. The FE's started in '58 and include, among others, 332, 352,390, 460 (?) etc etc.

OK,  CHANGED OIL,  used O'Reillys full syn 20 weight,  seems quieter but did gain some oil presssure,  10lbs,  that make any sence?

ok,  I've said before,  don't know very much,  whats a FE mtr,    my 312 57 ford,  I've got a 2 bdl intake laying  around, cST IRON, is that any good?

An intake for a FE motor of the 2bbl variety. My machine shop guy has a client who is on the hunt for one.
Thanks!  Hugh

Keep asking those questions! I've been into these old Fords about as long as you, and I'm always finding out I don't know as much as I thought I did.

good question,   I don't  know why I used a heavy oil either,  when I bought it I thought maybe it was a old restoration  an a loose eng,  who knows,  any way,  I'm  changing oil anyway.         thanks to all for info,  I've been into old cars for 35 yrs,  an  still don't know very much,  thats  why most of my  questions might seem  stupied,  don't ask   you don't learn

Thanks, David, I ended up having to cancel my Carlisle trip, due to bad back and leg pain the day before we were supposed to leave. Hopefully my health improves for either a later swap meet later in the year, or next spring. A Carlisle (or Hershey) swap is still on the bucket list.

I have to assume that you mean the coolant holes in the front of the heads, right? If so, yes they should both be open, at the rear passages, the passenger side will have a core plug, and the drivers side has the temp. gage sender, but both fronts should be open.