Switching motors.. need advice - The 1947 - Present Chevrolet & GMC Truck Message Board Network

77chevyinline6 · 01-15-2012, 02:15 PM

The inline 6 has to go its slow and drinks gas like a 350... i found a 307 but i can get a 327 also.. what all will i need to do? will i need to switch trannys? its 3 on the tree and drinks gas on the highway cause it holds back whats yalls opinion?

68Timber · 01-15-2012, 02:44 PM

Sounds like it might be a gearing problem which will be worse with a V8, mpg-wise. Do you know what rear gears you have?

77chevyinline6 · 01-15-2012, 03:35 PM

the glove box sticker says 3:40s

Car'n'Guitars · 01-15-2012, 03:49 PM

I say go with the 327.

77chevyinline6 · 01-15-2012, 04:23 PM

ive found a 307 with 40k miles on it

Car'n'Guitars · 01-15-2012, 04:25 PM

Which one do you want?

77chevyinline6 · 01-15-2012, 04:27 PM

i would rather have the 327 but the 307 is more on the budget ya know? and its only got 40k on it. the inline 6 is gone i wont miss it a bit haha

Car'n'Guitars · 01-15-2012, 04:28 PM

Quote:

Originally Posted by 77chevyinline6

i would rather have the 327 but the 307 is more on the budget ya know? and its only got 40k on it. the inline 6 is gone i wont miss it a bit haha

Yeah I understand everyone wants a 327, but the 307 isn't a bad little engine we got one in our Camaro.

76stepsidechevy · 01-15-2012, 04:28 PM

That 307s gonna be another slug unless you put some serious work into it. They were usually the base model v8. Go with the 327 or find a 350. 3.42 is a good all around gear, if you need a little more top end you could always run a taller tire.

77chevyinline6 · 01-15-2012, 04:31 PM

350s a no no way too hard on gas its my daily beater lol

Car'n'Guitars · 01-15-2012, 04:33 PM

So your looking for a bigger motor with good gas mileage not for horsepower?

76stepsidechevy · 01-15-2012, 04:35 PM

Then look for a 305, honestly in these trucks motor size doesn't have a huge impact on gas mileage. To a point you might even get better mileage with a bigger motor since it wont be working as hard to get it moving. What kinda of mileage do you get with the 6?

77chevyinline6 · 01-15-2012, 04:36 PM

yeah the inline 6 is slower than a chevette lol the v8 is gonna have a good bit more of power and i love the sound of headers and straight glasspacks

Car'n'Guitars · 01-15-2012, 04:37 PM

Quote:

Originally Posted by 77chevyinline6

yeah the inline 6 is slower than a chevette lol the v8 is gonna have a good bit more of power and i love the sound of headers and straight glasspacks

Yeah we have a 69 Camaro with a 307 cammed out with headers with cherrybombs and thats it. Stops right under the drive seats.

77chevyinline6 · 01-15-2012, 04:36 PM

forgot to add the 307 would be better on mpg because it wouldnt have to work as hard to go the inline 6 is to the floor alot goin up the hills on the backroads on NC

Car'n'Guitars · 01-15-2012, 04:39 PM

If you don't mind me asking what kind of price are you getting on the 307?

77chevyinline6 · 01-15-2012, 04:39 PM

i dont really know i havent checked but its using a 1\4 of a tank goin 10 min up the road to school. my dad has a 305 puts 2 gallons in it and can go ALOT farther and the reason im goin with the 307 is i know the guy really good that has it and trust the guy for a good deal

77chevyinline6 · 01-15-2012, 04:41 PM

the guys selling me the 307 for 400$ complete engine everything on it it came off of a 84 and the motor only has 40k on it

Car'n'Guitars · 01-15-2012, 04:49 PM

Quote:

Originally Posted by 77chevyinline6

the guys selling me the 307 for 400$ complete engine everything on it it came off of a 84 and the motor only has 40k on it

Thats great, dads old boss was one of those guys that has too much money for his own good, anyways he bought an old 70's rv thinking he could resell it on a profit. But has been siting at his lot for a year or two. Well anyways I might be able to buy the whole rv for $100 and it has a 454 in it.

77chevyinline6 · 01-15-2012, 04:51 PM

454 would be going in mine if it wasnt my daily driver lol.

Car'n'Guitars · 01-15-2012, 04:53 PM

Quote:

Originally Posted by 77chevyinline6

454 would be going in mine if it wasnt my daily driver lol.

Yeah I can't guarantee that it will have one, right now it has a 305.

77chevyinline6 · 01-15-2012, 04:56 PM

will a cam make it harder on gas?

Car'n'Guitars · 01-15-2012, 05:00 PM

Not sure if it will make it harder, but I'm pretty sure it will change your gas mileage but no clue how much.
We don't drive the Camaro too often anymore.

77chevyinline6 · 01-15-2012, 05:07 PM

yeah this things my daily driver and nightly cruiser gotta have the most mpg i can get.

Car'n'Guitars · 01-15-2012, 05:08 PM

Quote:

Originally Posted by 77chevyinline6

yeah this things my daily driver and nightly cruiser gotta have the most mpg i can get.

Yeah then I proably wouldn't put cam it it, also do you know what carb your going to use?

01-15-2012, 02:15 PM	#1
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Switching motors.. need advice The inline 6 has to go its slow and drinks gas like a 350... i found a 307 but i can get a 327 also.. what all will i need to do? will i need to switch trannys? its 3 on the tree and drinks gas on the highway cause it holds back whats yalls opinion? __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

01-15-2012, 02:44 PM	#2
68Timber I know the pieces fit Join Date: Nov 2007 Location: MONTGOMERY, AL Posts: 5,523	Re: Switching motors.. need advice Sounds like it might be a gearing problem which will be worse with a V8, mpg-wise. Do you know what rear gears you have? __________________ John 79 2wd Blazer (Bruiser) 85 M1009 Blazer (Sarge) build 74 Honda Z50 build

01-15-2012, 03:35 PM	#3
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Switching motors.. need advice the glove box sticker says 3:40s __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

01-15-2012, 03:49 PM	#4
Car'n'Guitars Registered User Join Date: Dec 2011 Location: Elkhart, IN Posts: 1,308	Re: Switching motors.. need advice I say go with the 327. __________________ 1985 Chevrolet K10 Custom Deluxe---SOLD 1997 Ram 2500 5.9 Cummins 1985 Chevrolet Camaro Z28 1987 Chevrolet K10 Silverado "The Beast" build 1987 Silverado http://67-72chevytrucks.com/vboard/s...=1#post6150257

01-15-2012, 04:23 PM	#5
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Switching motors.. need advice ive found a 307 with 40k miles on it __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

01-15-2012, 04:25 PM	#6
Car'n'Guitars Registered User Join Date: Dec 2011 Location: Elkhart, IN Posts: 1,308	Re: Switching motors.. need advice Which one do you want? __________________ 1985 Chevrolet K10 Custom Deluxe---SOLD 1997 Ram 2500 5.9 Cummins 1985 Chevrolet Camaro Z28 1987 Chevrolet K10 Silverado "The Beast" build 1987 Silverado http://67-72chevytrucks.com/vboard/s...=1#post6150257

01-15-2012, 04:27 PM	#7
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Switching motors.. need advice i would rather have the 327 but the 307 is more on the budget ya know? and its only got 40k on it. the inline 6 is gone i wont miss it a bit haha __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

01-15-2012, 04:28 PM	#9
76stepsidechevy Registered User Join Date: Nov 2010 Location: Windsor Locks Posts: 628	Re: Switching motors.. need advice That 307s gonna be another slug unless you put some serious work into it. They were usually the base model v8. Go with the 327 or find a 350. 3.42 is a good all around gear, if you need a little more top end you could always run a taller tire.

01-15-2012, 04:31 PM	#10
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Switching motors.. need advice 350s a no no way too hard on gas its my daily beater lol __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

01-15-2012, 04:33 PM	#11
Car'n'Guitars Registered User Join Date: Dec 2011 Location: Elkhart, IN Posts: 1,308	Re: Switching motors.. need advice So your looking for a bigger motor with good gas mileage not for horsepower? __________________ 1985 Chevrolet K10 Custom Deluxe---SOLD 1997 Ram 2500 5.9 Cummins 1985 Chevrolet Camaro Z28 1987 Chevrolet K10 Silverado "The Beast" build 1987 Silverado http://67-72chevytrucks.com/vboard/s...=1#post6150257

01-15-2012, 04:35 PM	#12
76stepsidechevy Registered User Join Date: Nov 2010 Location: Windsor Locks Posts: 628	Re: Switching motors.. need advice Then look for a 305, honestly in these trucks motor size doesn't have a huge impact on gas mileage. To a point you might even get better mileage with a bigger motor since it wont be working as hard to get it moving. What kinda of mileage do you get with the 6?

01-15-2012, 04:36 PM	#13
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Switching motors.. need advice yeah the inline 6 is slower than a chevette lol the v8 is gonna have a good bit more of power and i love the sound of headers and straight glasspacks __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

01-15-2012, 04:39 PM	#16
Car'n'Guitars Registered User Join Date: Dec 2011 Location: Elkhart, IN Posts: 1,308	Re: Switching motors.. need advice If you don't mind me asking what kind of price are you getting on the 307? __________________ 1985 Chevrolet K10 Custom Deluxe---SOLD 1997 Ram 2500 5.9 Cummins 1985 Chevrolet Camaro Z28 1987 Chevrolet K10 Silverado "The Beast" build 1987 Silverado http://67-72chevytrucks.com/vboard/s...=1#post6150257

01-15-2012, 04:41 PM	#18
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Switching motors.. need advice the guys selling me the 307 for 400$ complete engine everything on it it came off of a 84 and the motor only has 40k on it __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

01-15-2012, 04:51 PM	#20
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Switching motors.. need advice 454 would be going in mine if it wasnt my daily driver lol. __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.



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01-15-2012, 04:56 PM	#22
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Switching motors.. need advice will a cam make it harder on gas? __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

01-15-2012, 05:00 PM	#23
Car'n'Guitars Registered User Join Date: Dec 2011 Location: Elkhart, IN Posts: 1,308	Re: Switching motors.. need advice Not sure if it will make it harder, but I'm pretty sure it will change your gas mileage but no clue how much. We don't drive the Camaro too often anymore. __________________ 1985 Chevrolet K10 Custom Deluxe---SOLD 1997 Ram 2500 5.9 Cummins 1985 Chevrolet Camaro Z28 1987 Chevrolet K10 Silverado "The Beast" build 1987 Silverado http://67-72chevytrucks.com/vboard/s...=1#post6150257

01-15-2012, 05:07 PM	#24
77chevyinline6 Registered User Join Date: Dec 2011 Location: mount airy NC Posts: 308	Re: Switching motors.. need advice yeah this things my daily driver and nightly cruiser gotta have the most mpg i can get. __________________ 77 c10 (went from a inline 6 to 350) (converted to 3 speed in the floor) 350: mild cam, holley 600cfm 4bbl, summit stage 1 intake, accel billet distributer, flowtech headers, 2 1/4" exhaust with glasspacks, powermaster 160a alternator.

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