Muscle up my 81 cutlass supreme

[rancher]

this winter I will swap out the motor and transmission with a ls 5.3 and 4l60e with turbo. lots of questions about suspension. I will check in every day to see what similar builders are doing.

 

[L92 OLDS]

Sweet! That 4L60 will be on borrowed time. Might want to upgrade and do it once with a 4L80. That turbo 5.3 will tear it up.

 

[Turbolq4]

The 60 won't be up to the task. A built one is still a maintenance item at the power levels these are capable of. A decent used 4l80 with a transgo2 kit is cheaper and stronger. They go into our cars without much issue. Unless you really like to spend your weekends pulling transmissions....

 

[rancher]

The 60 won't be up to the task. A built one is still a maintenance item at the power levels these are capable of. A decent used 4l80 with a transgo2 kit is cheaper and stronger. They go into our cars without much issue. Unless you really like to spend your weekends pulling transmissions....

thanks, I have heard that, I have the motor and transmission from a Silverado now and have been looking around for the 80 but have not found anything local (rural northern Minnesota). I know that there are a lot of sellers online but I haven't seen prices I like. I will have to think this over. What do you think of coil overs up front?

 

[Turbolq4]

Coil overs are really nice but make sure you do your homework, spring rates can be difficult to get right. A good boneyard source for the 80e trans is 3/4 ton vans. Most of them come with small v8s but have the big transmission.