I have an 89 F-150 with a 5.0 that I rebuilt in 2000. I have only put about 7500 miles on it since then but I blew a head gasket today. When I rebuilt this motor I wished I had stroked it out to a 331 but I didn't. When the head gasket blew today I thought about swaping the lower end of this motor over into my 95 bronco that also has a 5.0 with a little over 192000 miles on it. Nothing really wrong with the bronco other than it just old and got alot of miles on it. But what I was thinking was put the pretty much new lower end of the 89 motor in the bronco and have the bronco's heads redone.

My question is do I just need to have them rebuilt or do I need to have them ported or what.

I am running a comp cam in the new engine. here are the specs.

Brand: Comp
> Part Number: 31-438-4
> Specs: .474 Lift Duration .050 Intake 212 Exhaust 218 Lobe Lift
.2960
> Intake & Exhaust Lobe Separation 114
>
On my 89 truck I have some HO Lincoln heads on it with shorty headers. So that is why I was wondering what to do with the heads on my bronco. I am thinking about taking the block from the bronco and stroking it out and put it in my truck. I have already did the mass air conversion on the truck but I didn't know if any one could recommend a good 331 stroker kit to run with shorty headers and stock aod tranny. I need lowend tork because I am running 38.5 mickey thompson baja claws on it with 5.13 gears. The motor before the head gasket blew had alot of power but not quite enough to pull overdrive well.

Also will I have to run a chip in my bronco. I don't have to in my 89 but it came with a new ECU when I converted it to mass air.

The bronco is stock everything. I haven't lifted it or anything I just hated to go through that lower end of the motor in my truck knowing the motor in the bronco is on its last leg.

 

Go for a 347 stroker kit and find a set of longtube headers, the MAF kit will have no problems with it and you'll get the torque you want.

 

I was wanting to go with the 347 but I read in a nother post that alot of people were having trouble with reliability on the 347 and they recommended the 331.

My main question right now is about the heads on the bronco with that cam I gave the specs to.

Does anyone have any suggestions on that.

 

What casting number are the Lincoln heads? If E6 they need a lot of work, E5 or E7 heads not as much, but will still benefit from pocket porting and smog hump removal on the exhaust side.

 

Stroke it? Hell man, just replace it with a 351W and then stroke it or leave it as is.

 

there hasnt been real problems with the 347's unless you are using the technology from the early style kits...if you do you HW you will have a engine just as reliable as a 331.

 

Well I would like to do the 347 stroker, then I would need to port and polish those lincoln heads but what I and wondering is are my stock heads on my 95 bronco enough for that little cam I have in the 89 block? I don't see no reason to go through the lower end of the 89 f150's engine just because I blew a head gasket. But it doesn't make sense to rebuild a motor with 7,000 miles on it when I have a 192,000 mile 5.0 in my bronco that will need to be rebuilt soon. So I am thinking about putting my lower end out of my f150 over in the bronco and then take the bronco's block and stroke it for my f150. I can't really go with a 351 because I did the frpp mass air conversion and it will not work on a 351. So I don't want to through that money down the drain.

 

I plan on having the heads rebuilt on the bronco but I didn't know if I need to have them port and polished or not. And I didn't know if I needed to buy some new heads for my f150 or if the HO Lincolin heads could be ported enough to due. I don't know what casting they are all I know is they came off of a mid 80's Mark VII and they have a heart shaped combustion chamber that is all the machine shop knew about them. He swaped them out for me because I had a craked factory head on my f150 back in 2000 when I took them in to get rebuilt. He told me he had those lincoln heads he would swap them out for just a little bit of money. So I did it.

 

I have been thinking about the smog pump removal on the bronco but didn't know how it would work since I do still have one cat on it. I removed it off my old 89 f150 but I have shorty headers and straight pipes on it. I didn't know if you could remove the pump while you still have a cat on.

 

What cam? If it's stock it needs to go. You should port the heads anyway.

Says who? The FRPP MAF kit runs my 351 just fine.

 

Those are E6 heads then... probably the E6TE heads which are very restrictive, but could also be the E6SE which are a little better. Regardless if you use these or some E7s on a stroker or 351, exhaust side porting should be seriously considered.

 

This is the cam I have in my f150 now. But I am thinking about putting the lower end of the this motor in the Bronco. Will my stock bronco heads flow well enough or do I need to port them??

Brand: Comp
> Part Number: 31-438-4
> Specs: .474 Lift Duration .050 Intake 212 Exhaust 218 Lobe Lift
.2960
> Intake & Exhaust Lobe Separation 114

I know its not a big cam but I just don't want performance to suffer because I didn't spend the extra dime and have the heads ported when I had them rebuilt.


The kit I bought for the mass air conversion states for 5.0 only!!!

I don't know what cam I would run in the stroker. But would like to put some trick/flow heads on it or just port the lincoln.

 

Like I said I don't know what heads they are. I had the hardest time finding spark plugs that fit them. I don't remember the number but it was like 5519 or something. Every one kept telling me to try 26's I think but they wouldn't work. One guy at a parts store said the plugs that fit them were GM and I would have to use delco but I found auto lite.

 

I really don't know much about stroking my motor out. So I didn't know if the kit came with the cam and lifters or how to match the kit with the right cam and lifters and heads and all that crap.

 

well...... the maf conversion should be able to go for the 5.0 and the 5.8 just all it's going to know is it's running lean in the higher rpm range, or rich in the lower if you have injectors that it's not tuned for.

tweecer.com is where i'm going to buy my ECU tuner.