What is it your building ?
What is it intended outcome & usage ?
What performance level et/mph ?
Will it be faster than 11.49 et ?
If your planning on racing it,
I'd highly suggest you get a sanctioning body rules book
{NHRA, IHRA, NDRA, SFI spec.'s, safety equipment etc.},
for what you intend to do, performance levels & follow the rules book to the T, to get thru tech...
I've used a few of their roll-bar/cage kits, for street cars, they were ok, never a full chassis kit from Jegs
had to always modify them to work/fit properly...
That's normal for any generic "kit", mass produced
Chassis Engineering also had decent low buck roll-bar/cage & a few chassis "kits"
all usually need some fitting & mods, especially the generic "kits"
Chris's were by far the best I used, in any "kit form"
Chris Alston Chassisworks made/makes a great product, I knew his old foreman Jim Berg too...