5.0 mainbearsing and oil pump replacement!

And i would take a breaker bar and socket and manual turn the crankshaft too…

For your oil viscosity, you used 20w50??? I hope that’s a misprint.

These engines require 5w30.

W in the oil viscosity rating stands for Winter if you didn’t know. That engine will be starved of oil when started if you did use 20w50. That oil is way too thick. S:(

Dreamer, That article from Car Craft was very interesting, but I think there are a couple of problems.
I think that would make a terrible engine in a work truck.
A friend of mine had what seemed to be the ideal PU truck back in the 1980s. I was in my thirties and working as an electrician (sometimes as an engine assembler, plumber, carpenter, or labor faker). All of my coworkers owned Chevy 3/4 ton PUs with 350/350, and I had one, then another. One friend had a 1971 Chevy with a 400 big block, a 4 speed trans with a granny gear and a rear end ratio of about 3 to 1. It had better acceleration and hauling power than the 350 equipped trucks and got about 5 or 6 mpg better than the 350s.
It had all the torque you would need in a real work truck and, with the right gearing, got very good gas mileage.
In my forties, I found a 1964 Pontiac Bonneville for sale with 29,000 miles on it. It had spent most of its life in a garage. It needed a lot of work and rather than fool with the engine (a 389 with over 10 to 1 compression) I found a late 1970s 400 Pontiac and rebuilt it for max torque and good mpg. The 64 Bonneville was a huge heavy car with a frame and an old 4 speed automatic that came in the biggest GM cars up to 1964. The 400 V8 I built had tremendous torque and somewhere around 360 hp. I drove to Mexico and back and got 18 mpg with it. That’s about twice what you get out of a 1964 high compression 389.
I had planned to haul a small trailer with it whenever I needed PU capabilities, but my X wife rolled it. I sold the engine and trans to friend. I should have bought an old PU truck and stuck it in.

Yarddog1950 – I was just giving the OP just some food for thought. The job of the transmission is to provide torque multiplication so depending on what transmission he has would definitely effect the performance of the engine. I am just trying to educate him along the way C8-). I really appreciate your responses though. I always learn something from your posts.

OnThe7thDayFord – That oil is way way too think. The people who suggested that oil probably have no idea what viscosity means and how oil is rated and what tests are completed on oil’s.

Keep up updated though!

Quoted From OnThe7ThDayFord:

Yes sir Im from Oklahoma. Next time ill make sure i come here and ask first…

I had heard a few times before that increasing weight can help but never did it Until now – A few guys at autozone talked me into it.
Lessoned learned

Its very sad how people are so misinformed regarding oil viscosity as well as what those numbers exactly mean on the bottle.

Increasing the viscosity of oil to try to take up the ‘slack’ from mechanical wear is never a good idea. You usually make it worse by starving the engine of oil.
The only time i would use 20w50 is if i participated in demolition derby’s and knew my cooling system would be ineffective after a few front end hits.

I am really not sure how well mixing a conventional oil and a synthetic would be due to the different chemicals. I would do a drain and refil.

Going back to the 351, you will have to do your research. I know the 351w is about 1 inch taller than the standard 302. I also believe the bell housing bolt patters are the same. A lot of the internals are interchangeable too.

If you decide to stick with EFI, i have no idea what changes you will need to make, if any for the PCM.

Usually most people if they decide to use a different engine will go Carb or use an aftermarket engine management system like Megasquirt for example.

If you go with this 351, you will be spending ALOT more money trying to get it running over buying a used lower mileage replacement long block or even short block for your F150.

Quoted From EricTheCarGuy:

I wrote a song in collage called “I love my Truck”, I think it fits you to a “T”. The song was kind of a joke (not about you just about the love of an inanimate object which in the case of the protagonist in the song happened to be his truck) and to be honest the swear filter will probably bleep out most of the lyrics if I posted them. C:P

That said if you love your truck that much I have but one piece of advice to offer and you already seem to be on the right track, talk to people that have already done what you want to do and learn from their mistakes, this will save you money and time in the long run and you might just be able to afford a new pair of glasses when you’re done. Till then best of luck.

Can you sing this to us on a FATR?

Thanks!

Offer him a 100 for the whole thing. He might part with everything for 125 or 150 or even 100.
In 1972 I made a deal on a nice 1964 Chevy Impala wagon with a 327 four barrel and twice pipes. The fellow wanted $550 and after some begging on my part, he agreed to $475. I couldn’t cash a check that evening, so I asked my father to drive me over and loan me some cash. When we got there, my father announced he didn’t want to pay $475 and offered $450. They talked it over and the fellow said he’d take the $450. THEN my father offers $400. The fellow asks for $425 and the deal was done.