if it has the 60deg v-6 bolt pattern then there is a 3400 crate engine that makes 190hp. there are carb manifolds available or you can get a jy 3400 with all the computer goodies that would be a much better setup but would be more work. this is from wikipedia, i wouldnt invest any money until i get a few different sources to verify. seems more likely to me a big car would have the 3800 pattern but logic doesnt always apply. it doesnt say anything about the engine mounts either
A new lighter V8 engine was rushed into production for 1982, the HT-4100 (option code LT
. It was a 4100 cc V8, designed for rear wheel drive and longitudinal front wheel drive applications sharing the same transmission bellhousing pattern as Buick, Oldsmobile, Chevy, and Pontiac rear and front wheel drivetrains for 2.5 L 4-cylinder and 2.8, 3.1, and 3.3 L V6. A transverse front wheel drive version was originally slated for 1983 and a new line of downsized Cadillac sedans, however, delays in the downsizing program shared with Buick and Oldsmobile postponed the introduction of those models until 1985.
HT stood for High Technology. For its time, the engine and its electronic control module (ECM) were quite sophisticated, despite having a throttle body injection system (as opposed to port fuel injection.) Like the 6.0/368" DFI engines before it, the HT4100 used an ECM that incorporated a detailed on-board computer. Every parameter of engine performance could be displayed on the Electronic Climate Control panel while the car was being driven. The HT4100 also pioneered other design features including replaceable cylinder sleeves, high operating temperature for emission control (210 degrees, compared to 180 in earlier engines), free circulation of coolant between the block and the heads, and bimetal construction that mounted heat-tolerant cast-iron heads onto a weight-saving aluminum block. The engine had a bore of 3.465 in (88.0 mm) and stroke of 3.307 in (84.0 mm), for a total displacement of 4.1 L (250 cu in). It initially was equipped with throttle-body fuel injection, with output of 135 hp (101 kW) at 4400 rpm and 190 lbf·ft (260 N·m) of torque at 2000 rpm.
In 1982 the HT4100 was the standard engine for the longitudinal front-wheel-drive Eldorado and Seville. It was also placed in many rear-wheel-drive DeVilles, and was available for the Fleetwood.
The HT4100 was prone to failure of the intake manifold gasket due to scrubbing of the bi-metal interface, aluminum oil pump failure, cam bearing displacement, weak aluminum block castings and bolts pulling the aluminum threads from the block. It may not have been the most successful engine to sit under the hood of a Cadillac, but potential buyers were no more satisfied with the other two engines available at the time, the V8-6-4 and the Oldsmobile 5.7 L Diesel. Reliability issues soiled the reputation of the HT4100. As a result, the V8 Oldsmobile gas engines were a popular and straightforward conversion.
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