What you all think!

What do you all think about a 302 motor or replacing it and going with a 351W. I got the car and it has around 140,000 and was a state police car for around 11-12 years. I want to either rebuild the 302 and possible stroke it to 306. Or get a 351W with fuel injection and just modify that. Which do you think would give me morepower for the money. Also i know where i can get a 302 block all hot tanked, Magna and stuff. But where can you get the 351W fuel injected with all that done anyone know? Well thanks for the advise..

I dont think you can go wrong either way. If it was me I think I would go the route of the 306 or maybe even the 331.

I'd stay with the 302 and build it up. You can make a decent moster out of a 302. And a 306 is not a stroker motor, that's just a 302 that has been bored .030 over to add the extra cubes. A stroker will increase the stroke of the crank to add more cubes, such as a 331 or 347.

If you want a 351w fuel injected then get a 5.7 out of a late 80s - early 90s F-150. But you will have to get a mass and all that other computer stuff that gives me such a headache :).

The extra money and time doing a 351W swap is not worth it unless your putting a rebuilt/modified 351W in it. Cause unless it came from a Cobra R there are no performance minded stock 351W built.

The 351W will not just be put in as a stock motor. I will do mods such as Cam, crank, heads, upper / lower intakes, rods, pistons, all the fun stuff. Then maybe blowing it, possibly. I want a performance motor in the car. Think its worth it if so where can you get a block that has been blueprinted, hottanked, and mangafluxed? anyone know?

IMO, you're better off with a well built 351W. Also, I wouldn't do a stroker for a street driven car.

IMO, you're better off with a well built 351W. Also, I wouldn't do a stroker for a street driven car.
What's wrong with a stroker for a street car?

The main problems with strokers on the street is the inherent lower compression heights of the pistons make them more unstable and they try to rock back and forth more, causing more wall wear over time. This is only really a problem when pistons get really short, most strokers are fine. I wouldn't go lower than a 1.2 comp height piston, preferably 1.3, on a street car.
As for 351/302 battle, if you're going the N/A route, if you like low end torque and a low redline better, go with a 351w, maybe even stroked to 393 or something nice. If you like high revving, I'd go with a 289 or 302. Get some forged pistons and spin it to the sky. For forced induction, it really doesnt matter. Whatever you like... You'll make more power on the same boost with the 351, but you could always just build the 302 for more boost. I'd personally do the 351. If you want to build a real powerhouse, what about a 393 windsor with Cleveland 4bbl heads? All the mods you need to do to put a cleveland head on the windsor is to drill a hole in the side of the head to match up with the 351w's intake water passage. The problem with this is you have to find an intake that is meant for cleveland heads on a 9.5" block... You could drill a hole in the front of each head, tap it and run an external tstat housing, then just use these adapters:
http://www.pricemotorsport.com/Intake_Adapters/AP-15/ap-15.html
and run any 351c intake you want.

Here is an external T-Stat housing from the same place, specifically designed for this mod:
http://www.pricemotorsport.com/Thermostat_Housing/thermostat_housing.html

The main problems with strokers on the street is the inherent lower compression heights of the pistons make them more unstable and they try to rock back and forth more, causing more wall wear over time. This is only really a problem when pistons get really short, most strokers are fine. I wouldn't go lower than a 1.2 comp height piston, preferably 1.3, on a street car.

Thats pretty much it. Its not a huge issue, but if you have a big stroker driven often. Its something you dont have to worry about at all with the 351W (non stroked) and still have more displacement. Personally, I would rather have a good set of aftermarket heads on a 351W than adapt the cleveland heads.

I gave the "Clevor"(cleveland heads on a windsor) as an option for a low priced way out. Stock 2bbls can be had for around $150, closed chamber 4bbls for around $300, OC 4bbls for $200-250. With a little bit of work, they'll move a lot of air, up there with the aftermarket heads. Well ported 2bbls have supported upwards of 550hp, and 4bbls much more. But I would also rather have aftermarket heads than stock... but I'd put aftermarket cleveland heads on it. I'm a bit of a cleveland fanatic. www.airflowdynamics.com.au/cleve2V.html
290cfm int/217cfm exh. A bit more expensive than your normal windsor heads, but they've got the flow to back it up... Theres another great company making heads for clevelands, CHI, but their website is down.