Ls1 swap

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85grandprix

Master Mechanic
Jun 23, 2017
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Hi guys I just purchased a 85 grand prix practically show room clean..only exception is a teen blew the sluggish v6 so now I'm thinking of doing an ls1 swap..all info would be greatly appreciated on how to make this switch..im deployed now so this forum is my only way of figuring things out..i have about a 5k budget is that workable
 
Welcome to the site from Houston. Let's see some pics of your ride. Your budget seems reasonable. Do you have an engine already? What transmission are you going to use? Fuel injection or carb?
 
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Welcome to the site from Houston. Let's see some pics of your ride. Your budget seems reasonable. Do you have an engine already? What transmission are you going to use? Fuel injection or carb?
Thanks man..im actually new to the whole modern swap into older cars I've always kept tbe original just did a few usual typical upgrades..ive seen plenty 5.7s online with everything for about 2200- 4000 ..i dont even know where to began..itll definitely be fuel injected
 

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I'm not an LS expert by any means, but i would carefully look at the 5.7's. Having an aluminum block is nice for weight, but people screw them up, then try to sell them off. From what i recall, they usually can't be bored due to having cast sleeves....i think a good hone is it.

If you search around, a complete 5.3 or 6.0 takeout can be had for around $1k-ish. That would leave room for a trans if need be, swap parts to bolt it in, gaskets, and other misc. stuff that always comes up.
 
I'm not an LS expert by any means, but i would carefully look at the 5.7's. Having an aluminum block is nice for weight, but people screw them up, then try to sell them off. From what i recall, they usually can't be bored due to having cast sleeves....i think a good hone is it.

If you search around, a complete 5.3 or 6.0 takeout can be had for around $1k-ish. That would leave room for a trans if need be, swap parts to bolt it in, gaskets, and other misc. stuff that always comes up.
I'll definitely look around..the 6.0s that I did see where rather high..i guess I'll just keep searching..if it comes with a trans does that make the process a little easier..
 
I'll definitely look around..the 6.0s that I did see where rather high..i guess I'll just keep searching..if it comes with a trans does that make the process a little easier..
With trans...yeah definitely since you won't have to do what I'm doing and locate a trans separately. The 5.3 I'm working on is already above what a complete takeout would cost....but with a yard motor you never know the condition until taken apart. I was able to score a freshly built short block, then put my touch on it.
 
Thanks foe
With trans...yeah definitely since you won't have to do what I'm doing and locate a trans separately. The 5.3 I'm working on is already above what a complete takeout would cost....but with a yard motor you never know the condition until taken apart. I was able to score a freshly built short block, then put my touch on it.[/QUOTE
Thanks for the help brother..im deployed right now but i definitely plan to get started once I'm back state side
 
Hi guys I just purchased a 85 grand prix practically show room clean..only exception is a teen blew the sluggish v6 so now I'm thinking of doing an ls1 swap..

Why are you looking specifically for an LS1 engine? As noted, most of those are trashed, high mileage by now. Maybe a typo? Many people equate LS1 to all things LSx
 
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Reactions: Injectedcutty
Why are you looking specifically for an LS1 engine? As noted, most of those are trashed, high mileage by now. Maybe a typo? Many people equate LS1 to all things LSx
I've seen many swaps and so many have been done that I figured it would be a budget friendly task..i could've done the usual 350 drop in but I wanted the old car but modern feel..do you suggest anything better I'm still researching so I'm open to suggestions
 
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