I purchased an used 302. Was told it came out of 88 mustang. It is a 5.0 EFI. Rebuild done and am placing it in my 83 F100. Heres my problem. I went to parts store picked up some Autolite double platnimum plugs for it and they dont fit. Had them check again the part number for both mustang and f150 in the 88 time frame and shows that autolite app24 or app25 is the right plug. However, they do not reach the threads in the head. It is as if the lenght/depth of the plug is not long enough. Any ideas would be great.....

 

That means you probably have E6S heads. Those take APP2545 plugs. The E6 is the 86 swirl combustion chamber head. It was only used on the Mustang HO motor in 1986. It was also used quite extensively on regular passenger car 302's such as Crown Vics...ect.. during the late 80's.

The GT40/Cobra heads also require the longer plugs.

 

Thanks for assist. This must be a T-Bird or Crown Vic motor then. THE EFI intake only said 5.0, no HO. Will pick up plugs for that model. The other issue I am having.....

I pulle of the EFI and replaced with EDELBROCK RPM intake and 4bbl carb, HEI Distributor and performance waterpump..etc...etc.... problem is....the intake and thermostat house has a bypass in it. If I connect the bypass hose to one connection on waterpump, and the other waterpump connection to heater hose....that leaves me with one heater hose to connect.....I cant connect it to the port in intake next to the distributor cause there is not enough room, connection hits dist. There are no other water ports large enough for the heater hose fitting to go into in the intake...any ideas....

 

The throttle body is on the drivers side on the pass car EFI 5.0's, and on the passenger side on Mustang HO's.

I'd have to go look at a couple of different HO (carbd and EFI) combonations I have on hand today to answer your other question, unlesss someone else chimes in.

 

OK Thanks....I know when I got the engine the efi intake and throttle body manifold was on driver side.....but is has been removed.....so just trying to figure out the proper way to connect the heater hoses and bypass hose.

 

On my carb'd HO using the RPM carb manifold there's no problem. The thermostat housing has the by-pass nipple on the passenger side and clears the 85 dizzy no problem. There's just a short molded ( 90* bend ) hose from the water pump to the by-pass nipple. I'd have to look at a couple of EFI set up's later today to see how they compare.

 

Not having problem with the bypass hose. it clears the 90 degree housing no problem and connects to waterpump. my question is,

if i connect one heater hose to waterpump connection that is free....that leaves me with one left to connect.......

original plan was to put heaterhose fitting in manifold by distributor but I have clearance issue there....and all other available opening in manifold that are in the water channels do not accept the hose fitting, they are too small.

 

Okay, on my carb'd HO with the RPM I have one heater hose going to the second water pump nipple and the other heater hose plumbed in to the outlet just behind the thermostat housing. As I recall I just got a nipple with the right size and threads from a hardware store, wrapped it with teflon and put in the outlet there. You may need to use swedged nipple in another outlet if your HEI is that big. Or you may have to put a plastic transition from one hose size to smaller in the line, and then to a smaller nipple. With the 85 Ford dizzy there's not a clearance problem on the RPM.

Since the 5.0 motor may come from a Crown Vic, you may want to verify that the distributor gear and the cam drive gear are compatible. Roller cam motors require a hardened steel distributor gear. I'm not aware that Crown Vic motors came with roller cams, I thought there were flat tappet, but I'm not 100% sure. T-Bird efi 5.0 motors were in many cases HO shortblocks though. Does it have a "spider" in the lifter valley?

On edit: Another possible solution to the heater hose problem is to find a water hose neck with no by-pass nipple and go directly to the other waterpump outlet, with the left over heater hose.

 

Thanks again. I did find the longer plug -- went with one for the crown vic.....as far as heater hose.....i found a nipple in the "HELP" section of my local parts store and it should fit one of the ports in the rear of the intake. Havent tried it yet. It does have Roller Cam/Hydraulic Lifters, also had a double timing chain. It does have the spider, that is if your refering to the piece that bolts down in the valley and holds the small brackets for the lifters....... this is my first rebuild/engine swap...so still learning......

The Summit HEI Distrubutor is too large...covers about a third of the water port on the front of intake.......

 

As I recall I had to install pipe plugs into some of the un-used ports. Some of those ports are air-vacuum ports BTW..so make sure of which are which.

It sounds like a 86 HO, or an HO type shortblock with 86 swirl heads. It may be a T-Bird HO. Do make sure that distibutor gear is correct (hardened steel) for the roller cam.

 

I am using summit part SUM-850020, HEI distributor, vaccuum advance, magnetic pickup. Does not have brass gear, believe it is steel.

I will put the other heater hose into a port along the back water channel of the intake, should be fine there. Already but the nipple with 3/8 fitting. 1/2 was too large. But still fits the 5/8 in hose for heater.

Any idea what kind of horsepower I should see from this thing....it is stock pretty much with the exception of being changed over to 650CFM Edledbrock carb and rpm intake, Hedman Headers, HEI Distributor, Electric fuelpump, regulator..etc..etc...and March performance pulley system....will also be using an electric radiator fan system.....

 

I'd call Summit and have them verify that it's roller cam compatible, because this has to be, or it will really screw things up. It's not okay if it's not compatible. Iron or soft steel will not do.

The 86 Mustang HO with E6S heads made 200 HP, and 310ft-lb's of tourqe. Those particular swirl heads have the valves shrouded, and this curtails air flow. E6S heads are very good for relative gas milege, low emissions, and low rpm tourqe production, but they just don't have the high rpm airflow capacity to get big HP numbers. One nice thing about the E6 heads are that they do give a great throaty exaust note.

 

OK thanks for all...will shoot summit an email and ensure the compatibility