My 348 round taillight LED conversion

An absolute must. Nice work. 1 thing that you may want to consider is swapping your red driving lights to the outside. One of the coolest things about that is the car looks wider (particularly at night) and it is the way the modern single light cars look.
Just a suggestion...(but a good one)

 

Thanks Jeff!
I wanted to keep things in line with the models of its era. I was thinking at some point of using red lenses throughout, but that would only mean sacrificing another set of Carello housings (read more $$$).

 

I just swapped the lights around on Paint and I think I'll have to agree with you, the reds are nicer on the outside. Guess I'll be playing around with this next spring!
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Yup
No sense playing with it just do it.ha ha

 

Nice job!
I did something similar, but kept the 348 grill look...
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Another interesting take on it. Both look ok