Here is my 454 before I put it in.
Took the front clip off to make things easier.
I painted everything black so the pics are kinda hard to see...
You can see the firewall bashing I had to clear the driver side cover.
Pass side Thorley header clearance...the second tube from the front is about 1/8" from the frame, my buddy put a small 1/2moom cut in his frame but I didn't need to but prolly should have for CYA to keep it from hitting when flexing.
I am using a small Malory EFI dist so clearence is not an issue. Plus I have a 3" body lift.
This is a shot of my new cog belt setup & the 73+ crossmember I used (gone now).
I put in an ORD 73+ crossmember cuz the factory 73+ one I put in cracked. This is a much stronger way to go..
www.diy4x.com makes a firstgen crossmember that pits better, not so close to the oil pan, DIY wasn't making them the time I did mine so OR was my only choice at the time.
as you can see the ORD is very very close but not touching....
Gotta love the power of a 454