View Full Version : TH 350 in hot rod
Ltfracing
04-15-2024, 05:38 PM
Has anyone put a TH 350 in a 33 hot rod,any modifications that need to be done to the crossmember ,thank you
cvacca
04-17-2024, 08:05 AM
Yes, going old school, I like that! Installed mine a few years back. Nothing to special. Mounted the crossmember upside down and used 1/2" spacers to get the angle I was looking for to mate to the IRS.
Ltfracing
04-24-2024, 03:54 PM
Do you have any pictures of how you installed it sir
cvacca
04-25-2024, 02:08 PM
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Sure, here are a couple.
Ltfracing
05-04-2024, 05:45 PM
Did you have to do anything to your driveshaft sir
cvacca
05-06-2024, 03:25 PM
No, I was able to use the one FF supplied with the kit when I told them I was installing a SBC383 w/ a TH350. I installed a Holley Sniper EFI with their Hyperspark distributor which is smaller than most so I was able to slide the engine and tranny back a little more to help with the engagement with the driveshaft.
Ltfracing
05-06-2024, 03:49 PM
Thank you sir,do you remember the parts # of the driveshaft they sent you any chance you could give me a measurement of it,thank you sir
cvacca
05-08-2024, 07:32 AM
FF part # 34048 which I believe is 31" long. My transmission tail shaft is 6" long and I believe 27 spline. If I remember right, I also bought a longer slip yoke from Denny's Driveshafts so to have better engagement into the tranny. I didn't figure that out until I had the tranny and IRS mounted that I realized the slip yoke would be to short. I read somewhere that you want it to engage 1" shy of bottoming out inside of the tail housing.
Hope this helps.
Ltfracing
08-20-2025, 06:17 PM
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So installing a th350 in 33 my left side bolt hits the trans case,second picture is of gentleman who installed a th350 in his 33 and it doesn’t hit,talked to FFR and there answer was to buy a new mount,lol im using the one supplied with the kit for a SBC install ,how is buying a new mount going to fix that
Just 1 More
08-22-2025, 10:52 AM
700R4 and I flipped that FFR bracket up, no trans mount spacers, std GM trans mount.
Ltfracing
08-26-2025, 08:58 AM
Any chance you can take a picture sir,thank you
Just 1 More
08-26-2025, 09:00 AM
Any chance you can take a picture sir,thank you
I'm sure I can slither under there and snap a few later today
Ltfracing
08-26-2025, 09:03 AM
Thank you sir,much appreciated
Just 1 More
08-26-2025, 04:52 PM
Thank you sir,much appreciated
Does this help?
218024218025
Ltfracing
08-26-2025, 06:40 PM
Yes thank you so much,so you didn’t use the adapter bracket,bolt mount directly to trans
Ltfracing
09-05-2025, 04:22 PM
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I figured it out,bought a lathe and made the parts I needed