The old 40,000 mile six cylinder engine and
transmission removed from the Jeep. One of the
reasons for needing more performance was the 33
inch tall tires and 4:11 gears. This combination would not provide
enough mid range to top end power. Another problem was that since the
Jeep was not driven much, the carburetor was always having problems. We
found a New 5.3 crate engine and 4L60E transmission. We then had to
purchase a starter, computer and Mass Air Flow. This swap can also be
done with late model used truck, IROC/TA or Vette engines. When
purchasing a used engine, be sure to get the computer, Mass Air Flow,
O2 sensors and, for emmision type vehicles, get the rear O2 sensors
In 1981 this Jeep, that now belongs to Clinton
Campbell of Dallas Texas left the
factory floor with a straight 6, but in the fall of
2003 he drove it away from
Street & Performance with a 5.3 truck LS-1 type
engine and a 4L60E transmission. Clinton wanted more performance,
with the recent enforcement of emission laws in
Texas, he needed to be able to pass emissions.
3.C/K Truck Balancer
Should have a new tightening bolt when replacing
balancers. Tighten to 110 ft lbs. Then back off bolt one turn.
Retighten to 35 ft lbs and then turn bolt a addional 140 degrees
The transfer case adapter is bolted to the 6 bolt
speed sensor housing.
The completed Transmission and transfer case.
Note the large round plug on the passenger side is where the
transmission wiring harness is plugged.
We installed a 26 gallon fuel tank with the in
tank fuel pump assembly because the new engines require 50 to 60 lbs of
fuel pressure. In tank pumps are more reliable because the pump is kept
cool in the tank and it only has to push the fuel and not pull.
Canister filters can not be pressurized in the first two seconds
that the key is turned on. Billet type filters are designed for
carburators and will not provide the fuel flow needed.
S&P offers a kit that uses a GM GF481
stainless fuel filter with 16mm O-ring to AN6 fittings and mounting
bracket. This kit is used when running one line up and one line back.
S&P also offers quick disconnect and braided rear exit fuel
line kits for most fuel injected engines.
LS-1 oil pressure manifold. Vettes comes with
factory sending unit, but must be replaced with your gauge sending
unit. IROC/TA and others have to be drilled and tapped to accept your
oil pressure gauge sending unit.
98 IROC/TA’s come with a three prong coolant
temp sensor part # 12551708. On all other engines we convert to this
unit so that we can use GM type gauges. This sending unit also supplies
the computer with the engine temp. The Street & Performance wiring
harness has the connection for this three prong sending unit.
99 Up Vette fuel filter kit will allow you to run a
single fuel line to the engine if desired.
Clinton decided that he did not want the big
truck manifold, so we installed this chromed Corvette manifold in its
place. We then mounted the S&P chrome accessories to match the
Lowering the new 5.3 truck engine into the engine
‘97-’98 Corvette's use an in and out
fuel rail like the truck style engine. ‘98 - 2002 IROC/TA use a
single fuel line like the ‘99 up Corvette. All single fuel line
systems can be converted to the dual line system. Dual line systems
have the advantage of always having cool fuel on top of the engine
which provide less chance of vapor locks in hot weather and with most
factory or after market tanks, it is easier to run one line out and one
line back. When using a fuel injection system it is imperative that you
use a filter that is for fuel injection. These filters are designed to
allow 50 lbs of pressure and a flow of 40 gallon an hour. Canister
filters can not be pressurized in the first two seconds that the key is
turned on. Billet type filters are designed for carburetors and will
not provide the fuel flow needed.