NAPA used to carry them so you might give them a try.
MustangSix":1mu90g17 said:For the push-on style, NPD part number 6766-5 for chrome or 6766-2 for black.
NPD 6766-11 is the one with a breather tube that goes to the air cleaner.
Summit Racing Stant Products 431-10061 is a chrome push-on and 431-10070 is the version with the tube.
The twist on style is in the Summit catalog too. Too many styles to list here.
The later blocks don't have a road draft tube to vent the crankcase directly. They work as yours is set up, drawing air thru the breather cap and sucking in fumes thru the PCV.
If you want to, there is an opening on some blocks where the draft tube might have been fitted. On the left side of the block near the front, there is a 1" plug that covers that hole. You could vent the block there, but there's really no need; the stock arrangement seems to work fine.
If the PCV is working well you should be able to pull the breather off and no fumes will come out of the opening. You might even feel a small vacuum.
The fluctuating oil pressure could have been the oil filter. It's rare, but not unheard of, for the filter to be defective and cause pressure to fluctuate. When you changed it, that might have cured it.
bubba22349":8ouvn119 said:Were oil pump bolts to block needs to have the correct gasket and be bolted on tight.
DropOut, the pressures starting up and idling sound fine to me, you ideally want 10-12PSI per 1000RPMs, and you should see some pressure drop once the oil heats upThe_DropOut":zpueikel said:UPDATE:
I did some tests over the last few days.
Using a stop watch I timed the oil pressure differences. Once the motor reached operating temp at 160 degrees the oil pressure was right at 40psi. The dip stick read a hair above the FILL line.
1:54 after thermostat opened (ATO [not an official word]) oil pressure began to drop.
3:20 ATO, oil pressure was at 35psi.
5 minutes ATO, oil pressure was at 25psi. Water temp was 175 degrees. No oil to be read on the dip stick looked like splatter.
Shut the motor off just after the 5 minute mark. Waited for the sound of oil draining back into the pan to stop.
.37 seconds for oil drain sounds to stop.
Started motor. Oil psi was at 25psi. I was expecting it to jump up to 40 as it had in the past.
Shut the motor off. Let it sit for 3 minutes.
Started the motor. Oil psi was at 30psi. Water temp at 170 degrees.
30 seconds after this last start up and the oil pressure began to fluctuate a little.
40 seconds after this last start up and oil pressure held at 30psi the entire time, fluctuations stopped.
1 minute after this last start up. Checked dip stick, no oil on stick, just looked like spray dots.
Turned motor off. Let oil drain back into motor.
30 seconds for oil drain back sounds to stop.
The motor did not fluctuate up and down drastically like it had before.
you can find a very similar bracket off of a Maverick, it's where i got mineJackFish":zpueikel said:Hey where'd you get that throttle cable bracket?