Dave84's Engine Build Thread!!

[Dave84]

Ok, hears what i have got so far, 1985 5.0 truck block with pistons and crank, and it had its stock heads, I am going to build this engine and hopefuly put it in next year,
Things I have done so far,,,
*replace oil pump so i can put my new oil pan on(insted of the truck pan)
*pulled old head's off (pistons only have small noches for valve clearence, Higer compression??)
Stuff i have for the engine
* 351 W heads casting # D0OE-C (Pedistal rocker mounts)
* H.O Headers
* Double Rollar timming chain
* Brand new oil pan (car style)
* Distributor
Things I need for the engine
* H.O cam and rollar lifter's
* Rollar rockers
* 4 BBL intake and carb
Things i am going to do
* Port the heads,
* Do a valve job
Will add more and have pics in a bit

[gabegt90]

Sounds like it's going to be a good build

[SLYDAWG]

Those D0 heads do not have hardened valve seats. If used as a daily driver on todays unleaded pump gas, hardened seats will have to be installed.

Also, not too sure about that factory roller cam in a flat tappet block.

[Dave84]

could i put lead additive in insted of changing the seat? beacuse the seats are in nice shape..

[DuceAnAHalf]

Those D0 heads do not have hardened valve seats. If used as a daily driver on todays unleaded pump gas, hardened seats will have to be installed.

Also, not too sure about that factory roller cam in a flat tappet block.

The lifter bores in that block are too short for the factory roller lifters. The lifters will either fall out of the bore or you will have oiling problems. Also the valley won't have the. Nubs that need to be drilled and tapped to hold the spider.

[gadget73]

Well, maybe. Some 85 motors have the taller lifter bores to accommodate roller lifters, some do not. Truck motors probably don't. All 86 and newer engines are roller motors though. If its flat tappet, you might be left with either an 85 HO cam or some after market cam. Can you get a pic of the lifter galley?

[OVERKILL]

As gadget said, you COULD be lucky and its a roller capable block, OR, it could have the bosses in the valley for the spider tray, just not drilled and tapped. I believe that block is too new to be like an early block with the short lifter bores.

If it DOES have the short lifter bores, a set of Crane link-bar lifters and away you go, as you can run any of the "late model" Hydraulic roller cams using those lifters.

Those heads are going to need some attention as mentioned above as well. New valve springs AT LEAST, and if they don't have hardened valve seats, getting some installed would be a good idea as SLYDAWG mentioned, though you COULD run them, its not like they are going to wear out overnight.