I have an 82 302 bottom end that stroke to a 347 a bronco that is a 90 fuel injected 302 AC I want to use the top end and wiring harness out of the bronco on top of the 347 along with transmission and transfer case 2 swap into an 87 f250 460 big block any tips suggestion or experience you could share it would be greatly appreciate it

 

So you want to put the 347 shortblock under the E7 heads and EFI intake from the 90? That won't work very well because the extra airflow will throw off the speed density computer. Also the E7 heads are pretty wheezy so all you're going to accomplish with the stroker is move the power band down - it'll be about like having a truck 351. All this is assuming it still has a small cam in it still. A big cam will make for a poor combo when matched with those E7 heads and eliminate whatever little chance it had of running halfway decent with the speed density ECM.

And then you want to swap this in place of a 460? I hope the 460 has a hole in the block because that's the only way this makes sense. The 460 is everything a stroked windsor is and then some. If your goal is power, start with the 460. If your goal is gas mileage, well, a 347 with E7 heads running on a speed density ECM isn't going to deliver any of that either.

Bottom line is that the first step to making real power with one of these trucks (any of the gas engines) is to swap to a tuneable EFI system. There's all kinds of options ranging from a Ford EEC-IV MAF system to an aftermarket throttle body injection.

 

I am looking to put aftermarket aluminum roller heads eventually and I have a mild cam in I the block already can you get aftermarket ecm and maf to handle the 347. The cost of building the 460 was three times what it would cost me to stroke a 302 I had laying around where the 460 needs to be bored and has other less the desirable qualities I'm looking for decent gas for the power it's putting out the 460 carved gets 8 mpg I'm hoping for 15 and around 375 hp 400

 

Yeah, you'll need different EFI. If you want to keep it Ford and multipoint injection, you can repin, rewire, and swap to a MAF ECM (A9L series) from a mustang and tune it with a quarterhorse or tweecer. If you want to use an E4OD, you'll need to use a 94/95 truck MAF ECM which is also supported by quarterhorse and tweecer. Another option to keep multiport is megasquirt.

A third option is a carb intake with a sniper or fitech "4-barrel" throttle body injection system on it. This last option pretty much tunes itself, so it's a great option for those who don't want to mess with connecting a laptop to the truck and learn all the details of exactly what the ECM is doing. The downside is it's more expensive and is a central injection system vs multiport. If you really want to spend money, the holly HP system does everything the sniper does and is a multiport system.

And then of course there's always the option of slapping a nice 600 cfm carb on it.

As for the swap itself, you'll need the engine mounts and driveshafts and several other pieces that are different between the small block and big block.

Finally, the 460 will make your 375-400 HP goal with just a cam, headers, and a little porting work. If you're interested, go look up "the mad porter" (he's a member here I think) as he specializes in the EFI 460.

 

Easy button is SPE. They sell an array of SD and MAF supported ECM for our trucks. It's what I would have went with before converting to MAF if I had known about them.

Look them up.

 

What is this "mild cam" that you put in... Cam grind number? If it's not too crazy a 5.8 PCM might get it running.
What trans are you using?

 

what I was thinking. A mild 347 is 4 inches short of a 351 so a 5.8 computer should run it just fine if it has the right cam.

 

I agree that with a mild cam and E7 heads, a speed density 5.8 box may work halfway decent. It's obviously not going to support aluminum heads though.