Originally Posted by HVYCHVY
I have a chance to buy a low mileage LT1 from a 96 Caprice Police car. Includes wiring Harness, ECU and is already re-programmed to delete emission, security etc. Aside from trans adapter, motor mount adapter etc. What else should I expect while making the swap/ install? Aside from the severe knock in the lower end of the current 350 there are quite a few components that are still in great shape such as the alternator, dist, etc. Advice, suggestions, experiences?
The alternator on the LT1 is clocked different from yours. If you don't mind pulling the case apart, you can simply re-clock it to fit the LT1.
I strongly recommend re-sealing the LT1 intake manifold prior to installation. The ends are sealed only with RTV, and it dries out after a while and makes some good oil leaks. GM has very specific instructions on re-sealing it, down to the bead-size on the new RTV.
Also I recommend replacing both the oil-level sensor, and the knock sensors, because both have a tendency to rupture internally causing oil leaks. Another problem area is the distributor. It's behind the crank pulley and water pump housing so its a PITA to replace it in the car (don't lose the intermediate shaft when you pull the water pump!). MSD makes a nice upgrade, but its $$.
Here's one I did a mild build on for a Qatari customer.