get ready to drop some loot.
1. Ross pistons are making custom for 3400, about $795, includes forged pistons, gas nitrated rings, 4340 tapered pins, and spirolox retainers.
2. Eagle H-beam rods from a small-journal SBC 5.7" centers, will need to be side clearanced a couple thousandths and then chamfered, about $400-500. Make sure you get the cross-grained rod caps and ARP rod bolts.
3. Line-bore the mains and add Moroso billet caps and ARP main bolts.
4. Wait till you get ready to drop on the boost before cam selection, but if you're going boosted, I'm going to recommend for a wild setup to use these specs: Dur @ .050 211° intake and 206° exhaust, Lift .515 intake and .512 exhaust (1.6rr), Lobe separation 115, Intake centerline 111.
This cam will have a bit of lope to it, and will put your powerband in the mid-upper RPM range, and has a good lobe separation angle (LSA) for a boosted setup. I'd say it's probably borderline streetable. about $400
5. Heads - go bananas on this one, this is where most of your flow will kick in. My setup consists of SI stainless polished valves, titanium keepers/locks, hogged to the max, and modified Crane Gold true roller bearing rockers. about $1200-1800
6. Cloyes true double roller timing gear set for the 2.8 will bolt right on, but you'll have to clearance the inside of the cover just a hair. about $99 from Summit Racing.
7. Crane or Competition Cams custom made pushrods, heat treated heavy walled chromoly, about $125
8. Have the oil galleys chamfered and smooth polished for quicker oil return flow to the pan.
9. ARP Head stud kit, consisting of studs, 12 point nuts and washers, about $230
10. .070 water-jet cut copper headgaskets with stainless bore rings. Will drop your compression to appx. 8.7:1 for your boost. about $200.
This setup is costly, but we're estimating that it should be good for boost in excess of 20psi and well over 600hp. There's only three of us that I know of that are going this far. One of us is currently 90% complete on it, but I'm holding out till next season for financial reasons as you can see