Comes down to budget. Some of the accessory kits run 3,000 which IMHO is crazy. The Holley set-up, granted not as "Trick", is 1,200.

it's a quite old thread but I went with Holley.

GM kit
 

Just buy the original Gm kit 19257325. Instead of the more expensive copy Holley makes.

https://www.holley.com/products/acce...s/parts/20-180

this is new works great. have one on my 69 Camaro. all good parts. ati damper/mechman alternator/sanden compressor

Billet Specialties Tru-Trac