351 swap to 300-6? - Ford Bronco Forum
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post #1 of 66 (permalink) Old 02-09-2005, 12:14 AM Thread Starter
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Question 351 swap to 300-6?

I saw a 300 6 cyl in a junkyard this weekend and could get it really cheap..plus it ran. It's out of a 86. I have a 79. Anybody done that? If so, any advice about do's and don'ts?
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post #2 of 66 (permalink) Old 02-09-2005, 12:58 AM
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stick with the M block they are better suited for the heavier broncos.

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post #3 of 66 (permalink) Old 02-09-2005, 01:04 AM
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Different tranny too
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post #4 of 66 (permalink) Old 02-09-2005, 10:28 AM
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your asking for a lot of work to swap to that motor.

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post #5 of 66 (permalink) Old 02-09-2005, 02:38 PM
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well if you want to swap the motor you need, a diff radiator, motor mount towers, different tranny if auto - if stick just a different bellhousing, i would also get rid of the feedback system on the 86 and swap it to duraspark.... Which you will already have on your existing 79 and would only need a dizzy and carb. Not a bad swap if you really want it or want something unique. Could install a turbo on it to have a little more fun

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post #6 of 66 (permalink) Old 02-09-2005, 06:18 PM
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Why would you swap a 8 for a 6 anyway, thats backpedaling
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post #7 of 66 (permalink) Old 02-09-2005, 06:40 PM
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six is alot better than a 302 and stock six has the same amount of torque as a 351w. There weak spot is in the head design as they can't flow above 3k. They are easy to wake up and are just like setting up a diesel, if i had more cash i would have the turbo on mine but right now i don't have the tools to modify my manifold the way i want and definately can't afford a custom one.....

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post #8 of 66 (permalink) Old 02-09-2005, 09:06 PM
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Quote:
Originally Posted by 85f150
six is alot better than a 302 and stock six has the same amount of torque as a 351w.
A 300 never had the same ammount of torque as a 351. Usually the 302 even has 10 more ft lbs in stock form and a broader power band too
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post #9 of 66 (permalink) Old 02-10-2005, 12:02 AM
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ur wrong there buddy, the 300 in the early to mid 80s had more torque and hp than a 302 and was knocking on the door of the 351. plus the 6 is bullet proof, can be easily modded and can definatly kick some bent-8s asses. ill take a 300 over a 302 and day and probaly a 351...

looks like we need to team up 85f150 against all the 6 haters =-D

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post #10 of 66 (permalink) Old 02-10-2005, 12:50 AM
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Well let me dig the books out..........



1980
300 = 243 ft lbs @ 1200
302 = 239 ft lbs @ 1800
351M = 263 ft lbs @ 2000
351W = 266 ft lbs @ 1200

1981
300 = 255 ft lbs @ 1400
302 = 233 ft lbs @ 2000
351 = 268 ft lbs @ 1200

1982
300 = 253 ft lbs @ 1200
302 = 232 ft lbs @ 1800
351 = 269 ft lbs @ 1200

1983
300 = 250 ft lbs @ 1600
302 = 250 ft lbs @ 2000
351 = 278 ft lbs @ 1400

1984
300 = 250 ft lbs @ 1600
302 = 250 ft lbs @ 2200
351 2 bbl = 280 ft lbs @ 1800
351 4 bbl = 305 ft lbs @ 2800

1985
300 = 250 ft lbs @ 1600
302 = 250 ft lbs @ 2200
351 2 bbl = 280 ft lbs @ 1800
351 4 bbl = 305 ft lbs @ 2800

1986
300 = 260 ft lbs @ 2000
302 = 270 ft lbs @ 2400
351 = 295 ft lbs @ 2600

1987
300 = 260 ft lbs @ 2000
302 = 270 ft lbs @ 2400
351 = 295 ft lbs @ 2600

1988
300 = 260 ft lbs @ 2000
302 = 270 ft lbs @ 2400
351 = 315 ft lbs @ 2800

1989
300 = 260 ft lbs @ 2000
302 = 270 ft lbs @ 2400
351 = 315 ft lbs @ 2800

1990
300 = 260 ft lbs @ 2000
302 = 270 ft lbs @ 2400
351 = 315 ft lbs @ 2800

1991
300 = 260 ft lbs @ 2000
302 = 270 ft lbs @ 2400
351 = 315 ft lbs @ 2800

1992
300 = 260 ft lbs @ 2000
302 = 270 ft lbs @ 2400
351 = 310 ft lbs @ 2800

1993
300 = 260 ft lbs @ 2000
302 = 270 ft lbs @ 2400
351 = 310 ft lbs @ 2800

1994
300 = 260 ft lbs @ 2000
302 = 270 ft lbs @ 2400
351 = 310 ft lbs @ 2800

1995
300 = 260 ft lbs @ 2000
302 = 275 ft lbs @ 2400
351 = 325 ft lbs @ 2800


1996
300 = 260 ft lbs @ 2000
302 = 275 ft lbs @ 2400
351 = 325 ft lbs @ 2800

So according to my books, the 300 does make more torque than the 302 up untill 1983 where they make the same ammount untill 1985. Then from 1986 on the 302 makes 10 to 15 ft lbs more than the 300 does.
And it makes more torque at a higher RPM where the 300 cant even rev too.

So what I said before:
Quote:
A 300 never had the same ammount of torque as a 351. Usually the 302 even has 10 more ft lbs in stock form and a broader power band too
Is right. The 300 never made as much torque as a 351, and the 302 usually makes 10 ft lbs more than the 300 (it did for 11 years)

Last edited by MikE2; 02-10-2005 at 12:56 AM.
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post #11 of 66 (permalink) Old 02-10-2005, 12:56 AM
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ok so u proved my point...the 300 is a better engine than a 302 anyway u look at it. IMO and many others, its the best truck engine ford EVER made.

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post #12 of 66 (permalink) Old 02-10-2005, 01:00 AM
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Quote:
Originally Posted by Optika1 illushun
all the 6 haters =-D
So now I'm a 6 hater?
I always liked the 300. Its a very reliable and durable engine. but it doesn't make more torque than a 351
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post #13 of 66 (permalink) Old 02-10-2005, 01:01 AM
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Quote:
Originally Posted by Optika1 illushun
...the 300 is a better engine than a 302 anyway u look at it.
My 302 can beat up your 300
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post #14 of 66 (permalink) Old 02-10-2005, 01:14 AM
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Quote:
Originally Posted by Optika1 illushun
the 300 in the early to mid 80s had more torque and hp than a 302
does that "hp" stand for hrsepower?


the 300 never mad more horse power than the 302

Dont make me type all the horsepower specs in too

and don't hate me because I have V8s

The only 6 I drive is a Cummins
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post #15 of 66 (permalink) Old 02-10-2005, 05:45 AM
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post #16 of 66 (permalink) Old 02-10-2005, 04:29 PM
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IMHO you couldn't beat the 300 with a 4 speed. Had that combo in my 90. Blew the 302 I have now out of the water.
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post #17 of 66 (permalink) Old 02-10-2005, 04:32 PM
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its all good, ill take my tractor like 300 over any bent 8.

and mike2, u can kiss meh ass! :-p

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post #18 of 66 (permalink) Old 02-10-2005, 10:28 PM
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I'll put my stock 302 and $1000 up against your 300....but since your all the way across the country I dont think its possible
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post #19 of 66 (permalink) Old 02-10-2005, 10:30 PM
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doing what? id be game for everything except a 1/4.

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post #20 of 66 (permalink) Old 02-10-2005, 10:50 PM
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