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darrellyates · 01-04-2017, 05:32 PM

I swapped a 5.3 and 4L60E... Not sure about difference between the "60" and "80"... However, I used some tubular mounts that bolted right into the stock motor mount holes. The worked fine, but I wound up clearance issues with headers. "Shorty" headers seem they would have avoided the interference; and I'm using them on my later conversion.

I used an aftermarket cross member for the trans. Removed the factory one, and the new one bolted right in, no problems. The mounts and cross member were from CPP.... Yeah, I know, I've read the vendor section and complaints, but everything I got from them worked and was delivered promptly. So, no complaints from me.

Think I had a couple of hundred in the mounts and cross member. It's been several years, so I don't know. Lots of people have generic trans mounts that bolt in and will work.

Good luck! You'll love the engine!

01-04-2017, 05:32 PM	#2
darrellyates Registered User Join Date: Jul 2016 Location: Gallatin TN Posts: 376	Re: LS and 4L80E in a 70, using orig mounts? I swapped a 5.3 and 4L60E... Not sure about difference between the "60" and "80"... However, I used some tubular mounts that bolted right into the stock motor mount holes. The worked fine, but I wound up clearance issues with headers. "Shorty" headers seem they would have avoided the interference; and I'm using them on my later conversion. I used an aftermarket cross member for the trans. Removed the factory one, and the new one bolted right in, no problems. The mounts and cross member were from CPP.... Yeah, I know, I've read the vendor section and complaints, but everything I got from them worked and was delivered promptly. So, no complaints from me. Think I had a couple of hundred in the mounts and cross member. It's been several years, so I don't know. Lots of people have generic trans mounts that bolt in and will work. Good luck! You'll love the engine!