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So, finnaly starting to gather parts for an LS swap. Getting a little overwhelmed and confused with all the information (and misinformation) on what works, what is needed, and what options would be best for my intentions. Searching for answers only seems to return outdated or contradictory information. Welcome to my first post, thanks for your hepl!!
THE CAR
1968 Firebird, street legal, small tire, 10 pt. cage, full built 400 SB, TH400, 4.11 locker in 9" with torque arm suspension. O.E. front subframe and steering.
THE PLAN
LQ4, twin turbo, continue to use TH400 and not need to move its location.
THE QUESTION
What motor mount plates are needed? I have seen both "stock location" and 1" rear mentioned in articles, when using TH400/350 transmissions. I have seen the "slide adjustable" ones, but would rather get proper plates.
Accessorie drive.... I will only be using the alternator (belt or electric water pump options open). Where is the best place for the alternator, to give maximum room for turbos & plumbing? I have seen a lower driver side bracket, that used an electric water pump, but does the altermnator clear the subframe in that location?
LS motors are flush with the back of the head so in order to place it into the stock location to bolt to your transmission you will want the 1" setback plates.
Some plates are labeled as stock location and some 1" setback. They basically both mean the same thing.
You can use 1" set-back/ stock location plates on a 1st-gen F-body but be aware that you won't be able to use the stock trans dipstick tube or a SB heater core if your car is equipped with one.
LS motors are flush with the back of the head so in order to place it into the stock location to bolt to your transmission you will want the 1" setback plates.
Some plates are labeled as stock location and some 1" setback. They basically both mean the same thing.
Cool, that's exactly what I needed to know. Thanks for clearing up the confusion as to why I was seeing 2 descriptions, for what is essentially the same application!
You can use 1" set-back/ stock location plates on a 1st-gen F-body but be aware that you won't be able to use the stock trans dipstick tube or a SB heater core if your car is equipped with one.
Thanks... I already have a Lokar firewall mounted dip stick. I assume that should still work. I also have a flush firewall, no heater box to worry about.
Side note Todd.... I read that you work for Holley?
Thanks... I already have a Lokar firewall mounted dip stick. I assume that should still work. I also have a flush firewall, no heater box to worry about.
Side note Todd.... I read that you work for Holley?
The Lokar piece should give you the clearance you need...and they are a PITA to add fluid through according to many users. Yes, I work for Holley as the designer of all the Hooker LS swap system components.
I have a 67 Camaro and went with the dirty dingo sliding mounts and it fit perfectly and the trans stayed in the stock location (mine is also a turbo 400). I thought they were definitely nice pieces.
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Pre-Swap Clarification & Questions 
