| BOTTOM END |
| Block: |
Factory Pontiac 400 two-bolt main |
| Year: |
'70-'74 |
| Preparation: |
Hot-tanked, magged for cracks, bored and |
| honed with deck plates, deburred, new cam bearings, |
| new brass freeze plugs, checked and |
| cleaned for assembly |
| Deck Height: |
Stock, 10.225-in |
| Crank: |
Eagle cast stroker crank 3-in mains, |
| 2.25-in rod journals |
| Preparation: |
Cleaned, inspected, checked for |
| bearing clearances and journals out of round, |
| micro-polished, and balanced |
| Balancer: |
Factory GM, two-piece cast-iron |
| Rods: |
Eagle 4340 H-beam, 6.625-in |
| Preparation: |
Cleaned, big and small ends |
| checked and fitted if needed |
| Bearings: |
Speed Pro 3/4-groove mains, Clevite 77 rod, |
| Clevite cam bearings |
| Preparation: |
Cleaned and inspected, checked for clearance |
| Pistons: |
Speed Pro Forged |
| Preparation: |
Pin-fitted, deburred, weight-matched and cleaned |
| Piston to Deck Height: |
0.010-in |
| Piston Pins: |
Speed Pro |
| Method Used to Retain Pins in Pistons: |
Pressed or floating |
| with double locks |
| Rings: |
Speed Pro file-fit |
| Preparation: |
Fitted to each individual bore, |
| deburred, and cleaned |
| Rod Bolts/Head Bolts: |
ARP, GM main and head bolts |
| Balancing Specs: |
Balanced to within half a gram |