I don't know if those tapped holes are truck specific. The water pump is truck specific, with a larger shaft diameter.  Nothing was attached to them when I got the truck, but that does not imply they have no truck purpose as my worn out ranch truck certainly economized on parts.  I found the holes useful for lifting the motor out of the chassis.

I was interested in the shorter WIX filter just to get more space between the filter and the frame.  The truck came with a full-size spin-on filter and I thought I'd like room around the steering box.

Allen
Corrales, New Mexico

'55 F-100, 292 y-block

I have a question about this.

I'm using Royal Purple 10w-30 break in, so glad to hear thays a good choice as I didn't have a choice. They didn't have 4 quarts so I had to buy a quart of RP 10w-40 HPS.

After break in I plan on running Prnngrade 10w-40 oil in this and my 61 tbird FE 390

My only other question is period of time to run the break in oil. I've had mixed opinions given to me. Some say after first drive, while others say 1000 miles. Also been told to use Stiction after break on. Any opinions on that additive?

Opinions welcome! Pic of the engine if anyone is curious.

  

Lots of opinions for how long the first oil change needs to be.  If having the engine professionally built, go with your engine builders’ recommendation.  With the more modern rings and cylinder wall finishes, there’s not a lot of wear taking place meaning the first oil change interval can be extended out longer.  The type of oil being used is also a player.  If it’s an oil designed specifically for break in purposes, then that oil would need to be removed earlier than what you would find with a more conventional oil.  200 miles use to be the old standard for the first oil change but with the more modern oils, a small micron oil filter, and what starts out as a clean engine build, then that mileage number can be further extended out.  Oil is relatively cheap compared to the damage done when not changing it regularly so just change it when in doubt.

Just my opinion on this so other opinions always welcome.

Lorena, Texas (South of Waco)

Thanks Ted. Your opinion carries some weight. I replaced the piston with Silvo-o-lite cast pistons, I believe I used King piston rings (I'll have to look at my receipt) and I did a medium stone home hone. So I'm thinking maybe 2 or three drives of about 15-20 miles and I'll change the oil when I check the head torque.