Okay, time to play a little catch up...
A few weeks ago I went to the Lone Star Throwdown here in Houston. I rode with another C/10 Club member in his 67. While at the show I was looking around at all the LS swaps and noticed that most of them were set really far back into the firewall. That got me worried I was going to be too far forward, so I mocked up the core support and radiator to check fitment.
Seems to have plenty of clearance.
Then I decided it was time to check the air intake. The K&N kit I bought was for a 2016 Silverado 2500 with the same engine... it apparently uses a larger throttle body, so I couldn't use the 90* silicone bend. I bought a Spectre GM 3.875" to 3.5" coupler, a 3.5" coupler and an aluminum 3.5" 90* bend and mocked it up.
It still clears, but the filter is going to try to sit where the tire is, so some trimming is in order.
I also installed the auxiliary battery tray I had purchased to move my battery. Since I'm no longer moving my battery, I decided I wanted to put the filter in that spot. I'll be doing some cutting and welding on that intake tube to get it to work, but I think it will be good in the end.
