300 or 390?

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Dec 18, 2007 | 10:46 AM

#16

quicklook2

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From: Lakewood, Ohio

Quote:

Originally Posted by Dean88

I would agree if they were both V8's, but they're not.

I look at cubes per hole, and well the 300 divided by 6 equal 50 cubes per hole and 390 diveded by 8 equal 48.75.

your math is a little fuzzy, the 390 still has 90 more cubic inchs.

Dec 18, 2007 | 10:52 AM

#17

95F350XL

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From: Belle Mead NJ

That is what I was thinking lol. What would I know about math. I can fix stuff thats about it, math aint my thing.

Dec 18, 2007 | 02:13 PM

#18

Dean88

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From: Sweetwater Texas

Quote:

Originally Posted by quicklook2

your math is a little fuzzy, the 390 still has 90 more cubic inchs.

True, but I was talking about cubes per cyclender.

Dec 18, 2007 | 03:33 PM

#19

quicklook2

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From: Lakewood, Ohio

sorry, i still do not get what you are trying to say.

Dec 18, 2007 | 05:57 PM

#20

flareside_thunder

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From: Florida

He's saying that individually the cylinders on a 300 have more cubes per cylinder than a 390 does......not saying the cubic inches of the V-8 are smaller just the volume of the cylinders.

JR

Dec 19, 2007 | 01:14 AM

#21

Krazy351w

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From: Paragould Ar

well like i said i have decided against the 390, gonna save that for a car project in the future. i know where i can get a used complete 300 for $400. is this a good deal? also how much would it cost to have the guy put it in also?

Dec 19, 2007 | 01:43 AM

#22

Mtthwvn73

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From: northeast, KY

I've got two I6's, and their both awesome motors, one with 235K miles and is my daily driver, motor's not been touched besides seals. The other is pretty much a parts truck, but it has 160K miles and will be a donor motor IF this one ever blows.

The longetivity thing is nice, but I'd rather have a 390 with a C6 behind it any day. In 1968 these motors were rated at the factory with over 300 horses, and gobs of torque. You can add a power package from edelbrock and make 418 horsepower and 434 ft lbs. of torque with a stock bottom end...imagine that!

I don't know...it'd be a tough choice

Matt

Dec 19, 2007 | 09:20 AM

#23

codyingersoll123

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From: Naples, FL

Id go with the older one just because the solid axles 390, c6 combo makes for an excellent platform to start from. cheap and easy to build. unlike these newer trucks. and even easier to work on.

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Dec 19, 2007 | 05:04 PM

#24

Krazy351w

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From: Paragould Ar

Quote:

Originally Posted by codyingersoll123

cheap and easy to build. unlike these newer trucks. and even easier to work on.

dont know what you call cheap. local shop around here charges 1500 for a long block build. im just a kid and cant afford that kinda money.

Dec 19, 2007 | 05:53 PM

#25

flareside_thunder

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From: Florida

That's alright...the younger you learn from experienced people the more better(redneck term) knowledge you'll have.....rather have ya learn it the right way than the wrong way.....Later On

JR

Dec 19, 2007 | 05:59 PM

#26

godblessmud

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It sounds like youve already made your descision, but no one adressed the question of what are you going to use this truck for?

Personally i would take the 390 any day, but mate it to a 4 speed manual.

Dec 19, 2007 | 06:25 PM

#27

Krazy351w

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From: Paragould Ar

mainly ill use it for a daily driver, but i pull alot of various things. i to would love to have the 390 but i have $800 to spend on a motor plus what ever else i need.

Dec 20, 2007 | 09:30 AM

#28

codyingersoll123

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From: Naples, FL

oh if its a daily driver def go with the new one then. it'll be more reliable and less of a hassle in the long run

Dec 20, 2007 | 10:13 AM

#29

sign_man

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From: Jackson

I built a 390 in a '67 F-100 I drove for awhile that got 14mpg with 3.25's and a Holley 1850. If you trash the low compression pistons, add an RV cam and the little Holley you will have gobs more torque than you ever will with that 300 for the money. Now, if you want a stock daily driver go with the 300, my father's 93 has 250,000 now, never burns oil.