Gen III GM LS V8 to TH350/700R4 Trans Adapter with Motor Mounts, Complete Kit

FLEXPLATE: The 4mm thick centerplate provides a solid foundation (that's 0.035 thicker than stock). Ring gears are precision welded to meet SFI 29.1 specifications, utilizing robotic cold-welding processes.

These flex plates are inspected throughout the manufacturing cycle to ensure a high quality, safe end product. FLYWHEEL BOLTS: Forged from aerospace alloy and heat-treated prior to thread rolling and machining.

Fits Chevrolet Gen III/LS Series Small Block. ADAPTER SLEEVE: This adapter sleeve will connect a GM LS engine crankshaft to an older GM 2/3/4 speed automatic transmission torque converter.

It centers the torque converter hub into the LS crankshaft. TORQUE CONVERTER BOLTS: These ARP torque converter bolt kits are for use with GM transmissions like th.

Gen III GM LS V8 to TH350/700R4 Trans Adapter w/Motor Mounts. Allows direct bolt-on fitment of previous generation automatic transmissions. Supports Non-LS 4L60 as well as popular older 3- and 4-speed automatics.

No modifications required to LS engine block or crankshaft. New LS flexplate features dual GM torque converter patterns of 10.75" and 11.10".

Flexplate is gold zinc plated, 4mm thick, and carries a SFI 29.1 certification. Torque converter adapter ring supports converter hub, no custom converter required. Includes ARP fasteners for torque converter to flexplate and flexplate to crankshaft. Not compatible with 8-bolt crankshaft Gen IV LS engines. Billet aluminum bolt on motor mount adapters allow use of SBC/BBC mounts.

Used LS Engines Are Cheap, But LS Swap Costs Can Add Up Quickly. We've seen the venerable LS swap in so many different platforms over the years. It is truly amazing as to what enthusiasts have installed these engines in. Ever since its debut in the 1997 Corvette, hot rodders have dropped the LS into other GM models, Fords, Mopars, imports, and exotics. It certainly doesn't hurt the argument that they are much more compact than Ford's modular V8 or Mopar's V8 offerings of the time and make considerably more horsepower.

The 5.3 LS and 6.0 LS are real performers, and even the little 4.8 LS is an option for a real budget oriented project. There are certainly some hurdles to LS swap installation, including, deciding to go or stick with, and so on, but one of the biggest issues is how to get that power to the ground. Not to mention the 4L60E and 4L80E transmissions are big, often causing fitment issues in a smaller vehicle chassis. We also realize that hot rodders are hoarders too, and that's a good thing.

So, we're often asked how to fit an older Turbo 350 or other such "classic" GM automatic up to these LS engines. You've got the transmission sitting on the shop floor, so why not use it, right? It's easier than you think! Everything Needed for A Painless Installation of Non-LS GM Transmissions to Gen III LS Engines. Unlike some engine swaps that require modifications to the transmission bellhousing, or even requiring the bellhousing to be cut off and a different one added, GM wisely retained the Gen 1 small block bellhousing bolt pattern for the Gen III (and Gen IV) LS V8.

So, most any non-LS GM automatic, including the TH350, 700-R4, or even the venerable Powerglide will bolt directly to the engine block with no modifications, though it does so with one less bellhousing bolt. The swap issue lies inside the bellhousing with the flexplate and torque converter relationship and how they attach. To address this spacing issue in the most cost effective way possible we offer a custom LS flexplate with the LS 6-bolt crankshaft pattern and 168 tooth count. The center section is 4mm thick, which is. 035-inch thicker than a stock LS flexplate and features a forged 1-piece ring gear to meet SFI 29.1 specifications.

The LS flexplate is drilled for both early SBC torque converter bolt patterns (10.75" which fits Powerglide, TH350, 200-4R, 700-R4, 4L60) and later LS converter pattern (11.06" 4L60E with LS engine). There are other flexplate solutions depending on the LS engine and transmission you are planning to use.

Be sure to read our in The Toolbox to explore all options. To properly support the SBC-style torque converter found in these earlier transmissions, a machined adapter ring is employed that engages the torque converter hub and the LS crankshaft, maintaining concentric support of the torque converter as it is mounted to the flexplate. Add in the correct high quality ARP fasteners, including LS flexplate bolts and a torque converter bolt kit to mount your new LS flexplate and attach your torque converter, and you have everything you need (except if needed) to easily adapt an early GM automatic to your LS engine. You can see how smoothly everything went together in our overview.

No Installation Hassles Since Everything in The Kit Is a Direct Bolt-On Part. In this day and age of "bolt-on" parts the term often leaves a lot to be desired. Besides the popular TH350 3-speed automatic and classic Powerglide 2-speed, this conversion kit will also work with GM's non-LS 4-speed overdrive transmissions like the 200-4R, 700-R4, and 4L60. Add in ICT Billet's small block Chevy to LS engine mount adapters and not only is your classic GM transmission a direct bolt on, but your LS engine will now directly bolt into place where your SBC or BBC engine used to reside.

These adapter plates are 3/8-inch thick aluminum for ultimate strength and include mounting fasteners. They support both early and late style small or big block engine mounts as well. Best of all, when using the appropriate mount holes, your classic transmission will sit in its original position.

This will allow you to be able to retain the use of the stock transmission crossmember in your vehicle for a complete bolt in engine and transmission solution. These adapters will raise the LS crankshaft centerline. 177-inch in the vehicle over the original small block location.

Note that this is not a direct LS to TH400 adapter kit. While the popular Turbo 400 isn't supported natively due to its larger 11.50 converter bolt pattern, if you wish to use a TH400 behind your LS you can simply swap your TH400 converter for a and everything will bolt right up then. The modern 4L80E uses the same 11.50 bolt pattern, but is not compatible with this kit, nor will this kit fit extended length crankshafts, such as early 6.0L applications, or 8-bolt crank Gen IV LS engines such as the LSA. GM LS Gen III to early GM 3/4 speed automatic.

Works with 10.75" & 11.066" (11.1) bolt-pattern torque converters. Forged 1-piece steel ring gear.

Works with stock LS starter motor. (1) LS Crank Sleeve Adapter. Diameter Small End: 1.70.

Diameter Big End: 2.00. (6) Gen III LS Flexplate Bolts. Fits Chevrolet Gen III/LS Series V8. Exclusive, flat, 12-point head design. (1) Torque Converter Bolt Kit.

Under Head Length: 1.25. (1) Motor Mount Adapter Kit.

Works with both SBC and BBC early and late mounts. Includes hardware to mount adapter plates to block and mounts to adapter plates. ICT motor mount adapters offer four positions for maximum adjustment of engine. The forward most bolt holes will place the engine. 100-inch forward of OEM bellhousing position.

Due to bolt interference, OEM location is not possible for any brand of flat style swap plates. Secondary positions place the engine. 600-, 1.86-, or 2.36-inches forward of stock location.

These swap plates will shift the crankshaft centerline up. 177-inch above factory small block location.

10.75" and 11.10". Will work with TH400 transmission if TH350 torque converter is used.

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