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· Premium Member
4,958 Posts
Discussion Starter · #1 · (Edited)
What needs to be done to change from EFI to carb on a 96 LT1 out of Impala SS. I guess the block will not support a mechanical fuel pump. Not sure about the roller cam being used with carb. This engine is to be run just as a standard carb engine, going into a 68 chevelle. Whats the process please...thanks

· Registered
1,529 Posts
Pretty straightforward:
1) Replace the efi manifold with the carb manifold, GM even offers one or two models in their GMPP catolog.
2) Drop in an HEI distributor (do not forget to remove the LT1's oil pump drive assembly)., and either leave the optispark hanging up front, or get an opti eliminator bracket from GMPP.
3) Run a regualr electric fuel pump.
4) Remember that the LT1 is a reverse coolant flow engine, so connect the radiator hoses accordingly.

Its been a while since I looked over an Impy LT1, but if the fuel pump bosses are there they could be machined to use a regular mechanical pump - engine disassembly required! Easier just to go electric on the fuel pump.

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