[Clyde65]

If you use the tubular motor perches from CPP, the trans crossmember from CPP, you will need to cut the top of the frame about an inch so ( right at the perch mounting holes) the CPP perches will fit properly( two rear holes on frame), this is how the 68-72 truck are done, since they could get a big block. this puts the motor about perfect, easily install electric fan and have room to put you hand behind the intake/engine at the firewall. The trans mount will bolt up to one of the factory frame holes on each side.

You can get the adapter for your LS engine at transdapt or CPP sells them too. I would suggest for you to go ahead and get all the frame work and mounts done first, put the adapterplates on the engine with the bolt style car motor mounts, slide the engine in leaving the perches a little loose until the trans cross member is right, then lock it all down.

I would also suggest you look at ebay for an ls engine harness, this is about 400.00, but it is all new, also you can get the pcm returned at Wait4me performance, this is all because I just did it and made mistakes and spent way too much money on stuff that didnt work or there was a better way to do it.

I hope this helps....

Clyde65