Join Date: Feb 2009
Location: Largo, FL 33774
Make sure you get the LO5 computer, or at least the chip from an LO5 computer.
You can get a set of Vortec heads, and a manifold with TBI adapter for about a 40 HP increase over the stock rating. You can also put a cam in it, and get a chip burned for the cam/heads specs. You can also get a slightly larger TBI, but you will have to modify the adapter for the larger bores. Another option is to smooth the bores of the TBI you have to get more flow. You would also have to open up the distributor hole for the OEM distributor.
While you have it apart, try to get the fuel line from a 91-93 Fleetwood, with an LO3/5, or both lines from a 93 FW. Both will have a Schrader port to check fuel pressure.
1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
Last edited by Fred Kiehl; 07-12-2019 at 08:55 AM.