welcome to the garage Tech, you don't really need measurements, just start from the trans and work forward, the small block mates to the trans the same as the 235, using the same rear crossmember to catch the bellhousing .... the modification you'll need is adding a fan shroud as the V8 is so much shorter .... also, if you want an HEI on it you'll likely need to massage the firewall a bit .... here's a shot of the
factory front mounts on the V8, and
this is a shround from a 60's car that's basically the same as originally used on the TF series trucks
hope that helps, and looking forward to a story on your project in the DITY forum with links to some pictures - we all like pictures

Bill