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| SPECS AT A GLANCE |
| '70 LT-1 vs. '96 LT1 |
|
'70 LT-1 |
'96 LT1 |
| Displacement |
350 ci |
350 ci |
| Rated Output-HP |
370 hp at 6,000 rpm |
300 hp at 5,000 rpm |
| Rated Output-TQ |
380 lb-ft at 4,000 rpm |
340 lb-ft at 4,000 rpm |
| Bore/Stroke |
4.00/3.48 |
4.00/3.50 |
| Compression |
11.0:1 |
10.4:1 |
| Two-/Four-BoltBlock |
Four |
Four |
| Crank |
Forged |
Cast |
| Rod Length |
5.70 |
5.70 |
| Rods |
Forged |
PM |
| Rod Ratio |
1.637:1 |
1.637:1 |
| Head Casting No. |
492/414 |
372 |
| Chamber Volume |
61-64cc |
54cc |
| Valve Sizes |
2.02/1.60 |
1.94/1.50 |
| Peak Flow Rates (in./ex.) |
207/146 |
218/173 |
| Screw-In Studs |
Yes |
No |
| Guide Plates |
Yes |
No |
| Cam Type |
Solid |
Hydraulic |
| Cam Lift |
0.459/0.485 |
0.450/0.460 |
| Cam Duration |
242/254 |
202/207 |
| Cam Lobe Separation |
116 |
116 |
| Intake Manifold |
Dual-Plane |
LTI EFI |
| Aluminum/Iron |
Aluminum |
Aluminum |
| Carb/TB |
Holley 3310 4V |
Dual 48mm |
| Carb/TB Rating |
780 cfm |
630 cfm |
| Tested Output-HP |
353 hp at 5,600 rpm |
351 hp at 5,700 rpm |
| Tested Output-TQ |
392 lb-ft at 4,100 rpm |
379 lb-ft at 3,900 rpm |
 The LT1 was run using a FAST...  The LT1 was run using a FAST engine-management system to control the EFI. Using the FAST, we were able to quickly dial in the air/fuel and timing curves. Jetting and distributor advance were used to tune the carbureted LT-1.  The LT1 was run using the...  The LT1 was run using the factory water pump (shown), while the LT-1 relied on a Meziere electric unit.  Both motors were run with...  Both motors were run with a set of Hooker long-tube headers feeding 18-inch collector extensions.
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