305 with LT1 intake
Thread Starter
Staging Lane
Joined: Jan 2007
Posts: 58
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From: Mooresville, N.C "Race City, U.S.A."
305 with LT1 intake I have a 350 i plan building in the future. I bought a LT1 for 200 bucks from a buddy not to long ago with everything. I got the idea to build a 350+ HP 350CI (possibly 383) with Alum LT1 heads on a 1989 350 block and I wanted to use the intake off the LT1. I plan on sending it to LT1 intake pretty soon to have it modified to fit but I was thinking maybe I could throw it on my 305 if I come across a third gen TPI 5 speed wiring harness, would there be in problems doing that?
Thread Starter
Staging Lane
Joined: Jan 2007
Posts: 58
Likes: 0
From: Mooresville, N.C "Race City, U.S.A."
It's been done before... go look at LT1intake.com, that's the guy that does the whole conversion process for a price. All i'm asking is if after I get the intake molded to fit the distributor, fuel lines redone, etc. and wire up a TPI harness or does it need to be a LT1 harness?
edit: forgot to mention, cooling is not affected; the intake on the 305 is only temporary untill i get the 350/LT1 heads built and ready to use
edit: forgot to mention, cooling is not affected; the intake on the 305 is only temporary untill i get the 350/LT1 heads built and ready to use
Originally Posted by Z-ROC28
It's been done before... go look at LT1intake.com, that's the guy that does the whole conversion process for a price. All i'm asking is if after I get the intake molded to fit the distributor, fuel lines redone, etc. and wire up a TPI harness or does it need to be a LT1 harness?
edit: forgot to mention, cooling is not affected; the intake on the 305 is only temporary untill i get the 350/LT1 heads built and ready to use
edit: forgot to mention, cooling is not affected; the intake on the 305 is only temporary untill i get the 350/LT1 heads built and ready to use
Hope that helps.
Thread Starter
Staging Lane
Joined: Jan 2007
Posts: 58
Likes: 0
From: Mooresville, N.C "Race City, U.S.A."
I was just kinding hoping to do this just for a nice little project to do. But I could of sworn i read that most of the conversion is only for pre-87 model heads but I don't know, mine is a 91 if that changes anything?
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i just did this lt1 intake on my friends 350tpi. just get the intake machined for distributor and coolant passages at the back of the intake and bolt whole done depending on what style heads you have. it bolts up and cures the breathing problem the tpi's have above 4000rpm. and it makes one hell of a difference.
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yes it can be done, BUT for the price of gen 1 sbc heads why would you? Hell some lt1 guys are getting gen 1 sbc heads machined to work on lt1's because you can squeeze more cfm out of a good gen 1 sbc head ANYDAY
Thread Starter
Staging Lane
Joined: Jan 2007
Posts: 58
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From: Mooresville, N.C "Race City, U.S.A."
Well... The LT1 i have is all cast iron (Caprice LT1). But my buddy from work has a cracked block LT1 out of like 95' Master craft ski boat with aluminum heads he sell to me for a good price... As everyone here knows, stock 305 TBI motors are slowwww, I just want to get some temporary juice out of it untill I can get the 350 rebuilt. But the question I was gonna ask is, should I just keep the 350 heads and have them machined/ported/whatever or buy the LT1 heads? Just to let ya'll know my plan is to basically just make an LT1 on a regular 350 block, so would that mean if I get that intake modified will it still fit LT1 heads? I'm new to engine crafting so forgive me if I say anything out of reason
Last edited by Z-ROC28; Apr 20, 2007 at 08:53 PM.
TECH Enthusiast
Joined: Sep 2005
Posts: 503
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From: TX
Originally Posted by Z-ROC28
Well... The LT1 i have is all cast iron (Caprice LT1). But my buddy from work has a cracked block LT1 out of like 95' Master craft ski boat with aluminum heads he sell to me for a good price... As everyone here knows, stock 305 TBI motors are slowwww, I just want to get some temporary juice out of it untill I can get the 350 rebuilt. But the question I was gonna ask is, should I just keep the 350 heads and have them machined/ported/whatever or buy the LT1 heads? Just to let ya'll know my plan is to basically just make an LT1 on a regular 350 block, so would that mean if I get that intake modified will it still fit LT1 heads? I'm new to engine crafting so forgive me if I say anything out of reason
OK,
First off, LT1 heads, while they will bolt up to the 350 block, will not work because of the differences in the cooling passages. It can be done, but there realy is no point in doing it. It will cost you way more than just buying a nice pair of heads for regular 350s that flow much better than the LT1s, even ported LT1 heads. The LT1 intake will fit onto the 350 heads just as it says on LT1intake.com however it will not fit onto vortec heads due to the taller intake ports, the parts will not match. My advice is to either find an LT1 and swap it in if you realy want an LT1. Or just wait and build the 350 and buy a nice set of heads that will fit the LT1 intake, or just buy a holley stealth ram.
In the end it will be cheaper and easier to do than all the parts swapping and converting.
Thread Starter
Staging Lane
Joined: Jan 2007
Posts: 58
Likes: 0
From: Mooresville, N.C "Race City, U.S.A."
So basically just building a regular 350 would be easier/cheaper? Does anyone make any aluminum 350 heads that the LT1 intake will work on? I was origionally going to swap a whole LT1 in, but I hear it's alot more trouble then it's worth to just swap to a 350 or LS1
TECH Enthusiast
Joined: Sep 2005
Posts: 503
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From: TX
Originally Posted by Z-ROC28
So basically just building a regular 350 would be easier/cheaper? Does anyone make any aluminum 350 heads that the LT1 intake will work on? I was origionally going to swap a whole LT1 in, but I hear it's alot more trouble then it's worth to just swap to a 350 or LS1
That pretty much tells you what you can and cant do.
Thread Starter
Staging Lane
Joined: Jan 2007
Posts: 58
Likes: 0
From: Mooresville, N.C "Race City, U.S.A."
I'm only looking to build a good 300+ HP street motor, it will be daily driven; would heads like these look up to my standards/fit the LT1 intake? I don't believe i saw Vortec anywhere on there
http://cgi.ebay.com/ebaymotors/PROCO...10992223QQrdZ1
http://cgi.ebay.com/ebaymotors/PROCO...10992223QQrdZ1
