Motor mount location

Hello guys,
Can someone give me the dimensions they used to locate the motor mounts for a
small block in a 47'-54' frame? I've done MANY engine swaps in street rods and I'm very familiar with firewall & pan clearance, and pinion angle. What I hoping for is that someone can give me reference points (ie. front of frame rail back 18"....), so that I can get the drive line in my truck without having to set the cab back on and mock up the radiator. I know I'm not the first guy to put a 350/350 in these trucks!
I just need some measurements to know where the center line of the side type motor mount should be.
P.S. I'm will be using a GM HEI dist. and "pusher"fans out front.
Thanks!!  

No one has any idea? Pretty please?  

I have done exactly what you have. What I found:
In order to get everything to clear appropriately, ie: steering, distributor, fan (I am using a mechanical) I had to recess the firewall a little (dont remember the exact measurment). I am also using a T350 trans and had to cut the floor and install a tunnel in the front portion of the floor to firwall for clearance. I understand its a pain in the you know what to test fit everything, but there is no substitute for doing so. There are so many factors applying to your specific application that I think you will probably save much more time by mocking everything up first.
Just my opinion  

jwarner1963

Thanks for the reply, and I agree that "test fitting" is a good idea, I just figured since I'm
going with such a standard, run-of-the-mill install, somebody would have a build underway and could give me "ballpark" measurements.
I was at the Goodguys event here in Joliet IL this past September and saw at least 6 trucks with 350/350 drive trains, and only one or two with a recessed firewall. I believe it is necessary in order to run a mechanical fan, but if I go electric out front I think I can retain the stock firewall.
Again, thanks for your comments!
-Mike