what kind of internal do you guys recommend, its going into a 71 chevelle
i'll be getting about 800ftlb

Suncoast can build it for you, not sure what they use for guts though.

Now that sounds cool, I want pictures when your done. The 4l80e's and 4l85es can handle 1200hp+ according to Performance Guru's try this link out for some info and possible parts. http://www.transmissioncenter.net/4l80e.htm

Suncoast built my 4L80e behind the 454 in our 28000 Lb GCVW road train (motorhome +stacker trailer). The late Joe from sun coast said the 4L80e they build can easily handle this.