- Joined
- Aug 29, 2010
- Posts
- 47,017
- Reaction score
- 9,019
- Location
- OKC, OK
- First Name
- HotRod
- Truck Year
- 85 K20 LWB
- Truck Model
- Silverado
- Engine Size
- 454 - Turbo 400 - 3.73
That's what I was getting at, so it's never been assembled since being machined, so it's pretty much considered a fresh bore even thought it's been years ago. Just a plain old 2 bolt passenger car of truck block. Still good though. BBC's have biggo mains and can run alot of hp/tq without need for 4 bolt.
Those are open chamber 122 CC Oval Port heads. They may look rectangle to you if you're used to seeing peanut ports, but they're not peanut ports heads. They'll be the standard size or bigger oval ports, unless they were worked over and ported at the machine shop. They're also the smaller valve heads for the BBC's. I woudln't mind running those heads. Everyone always wants bigger valves. Smaller valves are better for the low end torque. Bigger valves only help on the big end, so unless you're running a high rpm race motor the gain you get from big valves can actually hurt you in one area, while it helps in another area that you're not as concerned with very often. Sure I'll run big valve heads, but I damn sure won't be paying the hundreds that people do to get .010 bigger valve.
Someone with a set of Peanut Port heads w 2.06 intakes and 1.72 exhuast valves, could swap their valve train to these heads and get better mid to upper range performance.
