I have a stock 302 out of an '87 bronco I want to rebuild and drop into my '69 half cab, I've been messing with the idea of turning it into a stroker? Any ideas???

 

There doesn't tend to be a lot of activity on this page. You might want to try out the "Engine Swaps" forum, as it gets a little more traffic. There are also forums for individual engine families where you might find more specific info, but I don't frequent the small block forum so I can't say how busy it is.

As far as your question goes, I don't have any personal experience with a 302 stroker, but if it were me I think I'd just jump to a 351W. With the taller deck it starts life as a stroker. I'd guess that would be a much easier starting point.

I know that there's not a lot of room under an Early Bronco hood for a taller engine. I still have the stock 302 in mine. But most Broncos have had a body lift (mine has) and I don't think it would take much to clear a 351.

 

What engine do you have now? Swapping from a six to an eight cylinder gets a little more involved. Plus by "87" I believe the hole in block for clutch linkage was removed. There is an adapter to overcome this issue but something to consider.

 

I have the 170 6 cylinder

 

1) Perches for the motor mounts will have to be moved.
2) The adapter and intermediate shaft between transmission and transfer case will have to be changed.
Add your location to your profile. Someone may be close with the parts you need. I have a complete tranny/ transfer case setup for a V8, I'm sure there are others.

 

Ya I found I kit that has new mounts an everything, the transmission isn't the stock one it's NP 435

 

I am unsure wether or not you will need to change the adapter from trans to x-fer case. I always though the were the same.... My opinion is a stroker is a lot more $$$ than dropping in a 351W and installing a body lift of getting a fiberglass hood to clear the top of the engine in the bay.

With a stroker you will notch the bottom of the bores to accommodate the longer crank stroke and keep the rod sides from hitting the bores. I think you can get away without notching on a 331, but you have to on a 347.

There will be no difference on mounting a stroker or the 302 in the bay. If you can get a cheap block, it is a lot easier to set the new motor mounts etc with a bare block rather than move in and out the whole engine heads and all.

You are also going to need a bigger radiator and have to weld in the lower rad mounts for the V-8 Radiator.

Just set everything in there and tack the new mounts and then finish welds and re-addembly. It should be a pretty easy swap

 

Ya I found a radiator, an mounts and everything, I'm getting a new hood as we'll. i was lookin more into the stroker kit, it's 331 cubic in, I found another rebuild that's close to stock but has forged flat tops with 4 valve reliefs, I was trying to find what I can do with that, I'm trying to find a cam but having trouble, I wanna find a hydraulic roller cam..

 

For the stroker kit, it might be easier and more cost effective to by a stroker short block. FMS used to have them, but Nowak and Coast High Performance have them. I have not favorites and think they all do good work. You are going to need to match the cam to the heads, and heads to CR of combo. My experience is be very careful of trying to bump of the CR if you want to keep the stock heads with a stroker. Err on the side of caution.... For stock heads the 87-93 Mustang heads are very good and plenty cheap. The later explorer heads are better, but the odd spark plug angles may make mating up headers very hard for you because the plugs exit the block at the opposite angle as the standard plugs do... means that on most stock headers your plug end and boots with conflict with the header tubes, or manifold tubes for that matter....and I do not think the extra HP the have is worth the trouble.
I really good and cheap setup for you would be the 5.0 HO heads, which you can convert to adjustable valve train one of two ways, or keep the stock setup... which I would advise.
If you go with these heads they have 64 cc chambers, so pick the stoker kit that gives a 9.0 CR with 64 cc heads. You get too close to ten you may have an engine the spark knocks.

If you have a non-roller block then you want to use the paired roller cam conversion lifters because they require no block machining and are drop in, and then pick a 351W or 5.0 HO roller cam and use the 5.0 HO 351W firing order. Pick a cam with about .500 inches and I think you will be very pleased with the combo. On a 331 I would not go over .51x inches with stock heads.... I think it is too much and will not work well in the Bronco.

 

Info only: The V8 intermediate housing and shaft are longer than for an I6. However, using a NP435, the shorter I6 housing is used due to the length of the NP435. With the right 28 spline output shaft 2wd NP435, only adapter needed is a I" adapter plate between tranny and intermediate housing. "Kurt" a member on classicbroncos.com makes these, and manufactured them for BC Bronco's. This combo allows using the stock crossmember and driveshafts with the Dana 20.

 

Thanks for all the advice!