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BRL · 10-24-2020, 05:43 AM

I swapped out my 250 IL-6 with 3OTT for a 350/350 combination in my stepside and the driveshaft was an exact fit.

I removed the riveted in trans. crossmember up front and added one from a salvage yard 68 Suburban with a Turbo 400.

Trans. crossmember bolted right into the frame holes further back.

I still used the IL-6 engine frame mounts from the inline 6 for the V-8, so the engine sits way back to the firewall but the Turbo 350 trans. had a short tail on it and the driveshaft fit just right.

You probably would have V-8 mounts in the front frame location holes in the engine compartment, so I'm not sure if a long tail turbo 350 would make up the difference, but anyway my setup worked perfect and it was entirely by luck.

10-24-2020, 05:43 AM	#4
BRL Registered User Join Date: Jun 2014 Location: Tahuya WA Posts: 522	Re: Changing to an automatic transmission I swapped out my 250 IL-6 with 3OTT for a 350/350 combination in my stepside and the driveshaft was an exact fit. I removed the riveted in trans. crossmember up front and added one from a salvage yard 68 Suburban with a Turbo 400. Trans. crossmember bolted right into the frame holes further back. I still used the IL-6 engine frame mounts from the inline 6 for the V-8, so the engine sits way back to the firewall but the Turbo 350 trans. had a short tail on it and the driveshaft fit just right. You probably would have V-8 mounts in the front frame location holes in the engine compartment, so I'm not sure if a long tail turbo 350 would make up the difference, but anyway my setup worked perfect and it was entirely by luck.