The glass packs I made from styrene tubing and the rust detail is a combination of paint and washes with some embossing powder and acrylic medium added to make the gritty texture.
Finally, here is a picture of the engine bay in all its gory glory. I had to move the firewall back just to get the engine to fit. I wanted to use this '58 Impala tri-power engine, until I found that it wouldn't fit. I then tried the kit engine and found that it had the same exact fit issues. I decided that if I had to force-fit an engine, it may as well be the one I want.
This is the area that gave me the most trouble, so much so, that I actually considered building this as a curbside.
Again, thanks for all your kind and insightful comments. If any of you had a similar experience with this or any other kit, please feel free to share any observations, suggestions or solutions.
David G.