Crate 350 in 85 k5 can’t get up to highway speed

[73kay]

Hey all,

I just dropped a crate 350 in my 85 k5. I reused the dizzy, exhaust, intake and carb (Quadrajet) and went to get gas for it today. Painful trying to get up to speed (60-65). I even had to literally floor it to maintain 60.

I have 3.08, 30in AT tires on 15in wheels with the 700r4. I have a c10 short bed with the same crate engine but with 3.40, headers, Edelbrock intake and carb. Talk about a difference.

Things going thru my head:

1. Maybe a cam lobe got wiped. (Init breakin oil/filter didn’t look bad)
2. That’s just 3.08s

I appreciate any feedback, been planning on 3.73s but they may come sooner than I thought if this is a normal “dog k5”