Rebuild My 305 or Swap for Used 350
06-05-2007, 06:50 AM
#16
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Join Date: May 2000
Location: Chesapeake, VA USA
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06-05-2007, 11:47 AM
#17
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Join Date: Aug 2006
Location: Kansas
Posts: 3,706
not at all, u can actually use those motors to make more power and torque than a lot of big blocks out there 
theres a local guy with one in his nova II and he runs 9s on it and even has the rear tubbed for it.
Im actually planning on building one comming up this fall
theres a local guy with one in his nova II and he runs 9s on it and even has the rear tubbed for it.
Im actually planning on building one comming up this fall
06-05-2007, 11:03 PM
#18
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Join Date: Apr 2004
Location: Holland, NY
Posts: 1,610
go 350, the 305 is crap, yes people have made lots of power and gone pretty fast with them, though the same parts (and cost) in a 350 will net more power, it just has more potential. You can take a 305 all the way up to 340 cubes if desired. But i would strongly recommend the 350 instead. For 1500 you're not going to get much more than a stock/stock rebuilt 350, so if i were you, just save you're money and build a motor on the side.
Check out jegs.com they supplied me most everything.
06-06-2007, 12:39 AM
#19
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Join Date: Mar 2006
Location: j-ville NC
Posts: 94
Hmm 1200 for a full rebuild? and you're taking ls1's? got video? you'd need much more compression, bore, and stroke, then you'll need a good set of heads, and a decent cam and intake, and a carb to keep up to get you up to a ls1. so unless you're spraying nitrous..i dont believe a rebuilt 305 with stock heads (even ported) is taking anything making 300hp or more.
06-06-2007, 07:21 AM
#20
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Join Date: Dec 2001
Location: Slidell, LA
Posts: 426
so you more than doubled your horsepower with just a full rebuild? Well damn, wish I would have kept my 305 now. Who needs an LT1 when I could have done that.
and whoever was talking about a 6 cylinder is out of their mind.
Last edited by 92LT1RS; 06-06-2007 at 07:25 AM.
06-06-2007, 04:25 PM
#21
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Join Date: Mar 2004
Location: Richmond, Va
Posts: 461
Hmm 1200 for a full rebuild? and you're taking ls1's? got video? you'd need much more compression, bore, and stroke, then you'll need a good set of heads, and a decent cam and intake, and a carb to keep up to get you up to a ls1. so unless you're spraying nitrous..i dont believe a rebuilt 305 with stock heads (even ported) is taking anything making 300hp or more.
06-07-2007, 01:06 AM
#23
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Join Date: Aug 2006
Location: Kansas
Posts: 3,706
Yeppers. There are actually quite a few articles that range anywhere from 300 hp, to 350hp, to 375hp like you said. I've posted them numerous times.
WTF are you talking about. A 300 inline six ford? A high-revving, rare 302 Chevy? WTF are you talking about?
I spent 1200$ on a rebuild for my 305, plus the cost of tires, exhaust, sfc's etc, and my combo would take most LS1's. That's including a full rebuild too
Check out jegs.com they supplied me most everything.
WTF are you talking about. A 300 inline six ford? A high-revving, rare 302 Chevy? WTF are you talking about?
I spent 1200$ on a rebuild for my 305, plus the cost of tires, exhaust, sfc's etc, and my combo would take most LS1's. That's including a full rebuild too
Check out jegs.com they supplied me most everything.
im talking about the 302 inline 6cylinder GMC found in the 1952-1960 army truck such as the m135 or m211
06-07-2007, 09:19 AM
#24
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Join Date: Apr 2004
Location: Holland, NY
Posts: 1,610
Hmm 1200 for a full rebuild? and you're taking ls1's? got video? you'd need much more compression, bore, and stroke, then you'll need a good set of heads, and a decent cam and intake, and a carb to keep up to get you up to a ls1. so unless you're spraying nitrous..i dont believe a rebuilt 305 with stock heads (even ported) is taking anything making 300hp or more.
Of course it's the mexican laughing.
06-07-2007, 01:04 PM
#25
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Join Date: Jan 2005
Location: Appleton WI
Posts: 150
I have a crazy buddy whom I gave my old 305 to. He transformed a mustang to accept a small block chevy. He is in the middle of running his fuel system and turbo system. He is going to see how much boost a stock 305 can take, and see what kind of mph he can run at the track. BTW, he is running a stock TH400 trans and the 8.8 rear end.
All this is done for under what you are willing to spend grated i gave him the motor and he had the trans already.
All this is done for under what you are willing to spend grated i gave him the motor and he had the trans already.
06-08-2007, 12:15 AM
#26
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Join Date: Mar 2006
Location: j-ville NC
Posts: 94
i'd like to see the parts list for all of the above for 1200 bucks, i have the stock 305 from my 91' and i'd like to see it take most ls1's. any video, dyno sheets, or time slips? i'd like to see them
06-08-2007, 09:37 PM
#27
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Join Date: Apr 2004
Location: Holland, NY
Posts: 1,610
I've listed my build a few times. But if your that curious, look here
http://www.goingfaster.com/spo/325_h...chevrolet.html
http://www.hioutput.com/tech/343hp/343hp.html
But I used Jegs for a majority of my stuff.
http://www.goingfaster.com/spo/325_h...chevrolet.html
http://www.hioutput.com/tech/343hp/343hp.html
But I used Jegs for a majority of my stuff.
06-12-2007, 03:03 PM
#28
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Join Date: Jun 2003
Location: So.Cal on the Best coast
Posts: 866
I am surprized (NOT!) with the age of these cars getting up there, that everybody is still chopping these things up, just for the extra HP. IF and I say IF your car is in really good condition you may consider keeping that 305, only to keep it a numbers matching car. That would bring you a much higher return in the future, from someone that wants a collector. If your car has been a beater (like 90% of these cars)then by all means drop in that 5.7. This is just my $.02 on the subject, I could be wrong.
06-15-2007, 02:07 PM
#29
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Join Date: Dec 2001
Location: Slidell, LA
Posts: 426
I am surprized (NOT!) with the age of these cars getting up there, that everybody is still chopping these things up, just for the extra HP. IF and I say IF your car is in really good condition you may consider keeping that 305, only to keep it a numbers matching car. That would bring you a much higher return in the future, from someone that wants a collector. If your car has been a beater (like 90% of these cars)then by all means drop in that 5.7. This is just my $.02 on the subject, I could be wrong.
do you realize how many of these cars were built? they are worth ****. the only ones worth anything are the rarerest of the rare tha only a few were built. such as the Turbo Trans Ams or some of the Mecham cars. thats it. the rest of them, you're not going to get a "much higher return" on.
06-15-2007, 02:33 PM
#30
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Join Date: Jun 2003
Location: So.Cal on the Best coast
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do you realize how many of these cars were built? they are worth ****. the only ones worth anything are the rarerest of the rare tha only a few were built. such as the Turbo Trans Ams or some of the Mecham cars. thats it. the rest of them, you're not going to get a "much higher return" on.Yes I know that there were tons of these cars made,but like said MOST were beaten to death, and you have your salt belt relics, and all of the hopped-up hot rods that soooo many are building (not saying that's bad), and salvage yards would rather crush for scrap metal than keep inventory these are afew of the things that are rapidly taking these cars out of circulation,is all I'm saying. Just something to concider.
