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Old 08-25-2003, 03:55 PM
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change a 302 into a boss 302

i was wondering what i have to do to change a 302 into a boss 302 if it's even possible.

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Old 08-25-2003, 04:13 PM
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off the top of my head, if i recall correctly, the biggest difference was the heads...... as usual, i'm at work, and don't have my motor book handy, or I'd be better equipped to answer with a more thorough me crazy....
but the boss 302 requires more hi end rpm for it to build the horsepower it's known for, and the 302 bottom end wouldn't hold up to it (hi rpm's) for as long.....
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Old 08-25-2003, 04:17 PM
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351 cleveland, or 351 modified/400 heads, and a solid cam with a 780cfm holley. Your best bet would to get some later 2v 351c heads with the 2.05/1.65 valves, the earlier ones had huge valves and ports and is simply too big for a little 302. Youll need to drill some holes into the intake sides of the head for a water crossover into the intake manifold. Get a boss 302 intake but be ready to pay 450 buckaroos for one. boss 302 intake

Keep in mind that this is late late 60s early 70s technology where ford would spin a 302 to 8000rpm to get 400+hp, there is a wide selection of actermarket heads out there that would simply outpower the cleveland heads. You can go out and buy a single plane intake, a healthy cam and some good heads and get 400+ without going much over 6500rpm. Just thought id let you know that theres better heads out there, but then again...they dont have the "cool" factor.
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Old 08-25-2003, 06:51 PM
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As already stated the main differences were the top end(basically the same as 351C 4v) and the intake and heads are available periodically for about $1000 for all three, but modern aftermarket Windsor heads will run circles around them. Other differences that helped to achieve the rpm it took to get the heads making power were a solid lifter cam and 4 bolt mains, also screw in freeze plugs.
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