A heat tab is a small usually washer shaped heat sensor filled with low temp melt solder. It is used by rebuilders to mounter overheating in rebuilt engines
so they can get out of a warrenty. It will be glued on the outside of the block or heads usely in a freeze plug are some place it can get hot fast like by the exhaust manifolds. "Warrenty void if removed" well be stamped on it. What this tells you about the engine with one of these present is that it is not going to be rebuildable because it is bored over size already. Also I would defiantly look for a roller cam engine as well. This coming from someone that machines heads and bores blocks everyday. Having done it 25 years.

 

I don't know much about the 300 I6 but I will try to help plus will stick around as I might be rebuilding one in the future.
Trav

 

Hey there buddy. I have the 300 I6 also. In tge future I plan on building the lower end. Rods, pistons, and find one of them OEM ford forged cranks.
Some parts for the full build minus rods.
Comp cams full high energy cam kit - K66-237-4 MPN
Harland Sharp 1.6 Roller Rockers - S4002-7 MPN
Fel-Pro Head Gasket - 1024 PN
Fel-Pro Intake and Exhaust Gaskets set
Melling Valves - Intake V1505 - Exhaust V1504
ARP Head Studs
Ford Forged Crank
Forged Pistons W/ CR Bump to 9:1 Stock bore

Btw I run a 66mm turbo on my 300. Its very peppy and tbh fast.

If you think of the rebuild like a little lego project if you will. That your taking apart to relocate. Its not that much of a daunting task. Theres just steps and a few extra processes involved. Keep it simple in terms of thought.

Like the other users said find a donor thats OEM pretty much. The walls on the 300 are crazy thick. Like holy **** ford made a tank of a block there. Ive seen piston go to .60 or is it 0.060. Any who. You have lots of room for a semi janky motor to be built right. If its efi, 3 angle valve job with a good porting. And find a way to bore or increase the overall size of the throttle body. Thats quite restricted anyways imho.

Theres a user over on fordsix that has a 450+ hp all motor 300. Its sick xD

Cheers

 

Okay here's an update, I stumbled upon a 89 f150 with a 300 I6 with clifford performance intake 2 barrel Carb and those expensive *** headers and the guy said I could pull the motor and keep those parts for $300... I'll be picking it up next week.... so changing gears I'm gonna build this 300 up and do a swap eventually... that's sick that your running a turbo, I wouldn't mind doing that but once again I'd have to read and figure that **** out haha anyway I'm gonna pull that motor next week and begin this build! Thanks for the info! I think I'm gonna stick with the Clifford intake and maybe take the adapter for the 2 barrel off and slap a 4 barrel on.. I have the manual tranny so I'm contemplating the efi to carb swap... any thoughts? Decrease in fuel pressure and a few other things and I'll be moving foward...

 

Here's the motor

 

fixed that for ya:

 

Thanks, idk why my damn phone keeps doing that man

 

He says the motor cranks and runs but he can't keep it running

 

Carburetor. That whole setup looks impressive but ......

 

But with good tuning on the carb and some diligence it can be done!