cypher

iTrader: (2)

I have been gathering parts to do this swap (1inch setback plates and old style 3 bolt mounts) and considering selling those and going with the new holley mounts.
If i currently have the Fbody pan, will that work with either of your mounts?
Are the main differences between the two types you sell for accessories mounting differences mainly?
My plan was to use the fbodystuff for now that came with my LS1 and then later on continue using those accessories moving to LS3 in years to come.(if thats even possible, havent looked that far ahead) or would swapping to different accessories help me out more in the long run?

Toddoky

Your F-body pan accessory drive system would be compatible with the Hooker engine brackets that maintain the stock engine/transmission mating plane position only.

A big part of the puzzle that you haven't mentioned is what transmission you plan on using...if you are using the 4th-gen F-body 4L60 or T56 that came with your engine, you will have to cut open your trans tunnel and rebuild it to clear the transmission and obtain desirable U-joint working angles.

If you want to achieve desirable U-joint geometry with either of those transmissions without having to cut the floor, you'll need to use the forward biased Hooker engine brackets, which will cause compatibility issues with your F-body oil pan and 4th-gen low mount alternator.

As you can see, there are specific advantages to either set of the engine brackets so you'll need to decide what suits your needs best.

cypher

iTrader: (2)

I have both, but using the T56.
I found these part #s. What is the part# for the trans cross member and when will it be available?
Hooker Headers 71221007 - Hooker Headers Engine Swap Mounts
Hooker Headers 70101318-R - Hooker Blackheart Long-Tube Headers For 68-72 GM A-Body LS Swap

Toddoky

The part number for the crossmember is 71222007HKR and expect a few more weeks of waiting for it to hit the shelf. Be aware that installing a T57 with those engine brackets and the Hooker crossmember is going to require cutting and rebuilding of the tunnel on your part as I explained earlier.

NorCalChevelle

iTrader: (2)

I wonder if my shifter will need to be moved to link up to the 4l80 since the forward mounts put it in a different position (forward, lol)? I'm thinking the Lokar kit that adapts my B&M shifter to a 4l80 should be useable (maybe minor adjustment) still.

Any thoughts from folks?

Toddoky

It will be minor since the distance from the eng/trans mating plane to the shift selector shaft is far greater on the 4L80/4L85 than any of the other GM automatics.

jsolo

Went through every page of this, but I just want to confirm since this is my first project! I have these hooker long tubes and the forward position mounts you've been talking about in this thread. For my '03 5.3L (Gen III) going into the 68 Chevelle, I'll need to buy 4th Gen mounts (to bolt onto the engine) to work with the hooker mounts that bolt onto the crossmember, correct?

Project GatTagO

iTrader: (7)

That's correct.

http://www.rockauto.com/en/moreinfo....379976&jsn=478

Andrew

ycgoat

There is a lot of info of what is and is not compatible in the installation instructions of the mounts, headers, and oil pan on the Holley web site.

Toddoky

Yes, that was all intentionally provided to remove as much aggravation and uncertainty as possible.

the450r

iTrader: (1)

I got some better installed pics. F body pan. Hooker headers.

Toddoky

That's great, the more pictures the better. Please identify the specific engine mounts you are using so everyone following along can identify the differences between your set-up and going the full Hooker/Holley route.

ycgoat

I am having commitment issues mounting my aftermarket cross member, because the body is off and I do not have the headers yet (I was trying to wait until later to buy the headers and oil pan). Could you tell me the separation of the exhaust pipes at the transmission cross member mount? I am trying to verify the cross member I have will work with the headers.

Toddoky

The spread distance between the Hooker A-body long-tube header collectors is approximately 20-5/8".

ycgoat

great, is that center to center or inside to inside. thanks

Toddoky

Center to center.

cypher

iTrader: (2)

quick question about the transmission crossmember that is being produced. how well does it work with aftermarket/homemade frame stiffening kits like
http://www.hellwigproducts.com/produ...fx-by-hellwig/

Toddoky

You would have to modify the ends of it to some degree just as you do the stock crossmember.

69 Custom S Vert

This is a picture of the Anchor 3064 engine mount that came stock on 4th gen camaro LS 350 motors. The tab in the top middle interferes with mounting to my LS1 6.0 Block. I think I can just cut the tab off. Any reason this is a bad idea?

69 Custom S Vert

Todd, have you come across this issue with the 4th gen mounts and the 6.0 iron block?