Ken Powell wrote:

Paul,
I remembered that you mentioned the engine buildup without the insides once
before. I put a 'dummy' together last weekend.  I also ordered the landing
gear/motor mount for my RV-4 last week.  This should allow me to do a complete
mockup of the firewall forward.  Thanks for the suggestion on the schedule 40
pipe - I didn't remember the size.  I am going to build the 'box' (which has no
top or bottom, only sides) mentioned below out of 2 x 4 lumber with gussets in
the corners to hold it square.

Ken Powell

That ought to work good. Your remaining problem is welding in awkward positions 
but it can be done of course. I fear the mount might pull out of shape if
I just tack it on the engine and remove it for final welding.
I have a warmer feeling if it is positively held in position during
final welding.
 
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