Cadillac STS, well spec'd up and not a bad engine but renowned for developing an oil leak that is a bitch to fix hence why you can buy them cheap. I think it's just a $3 oil seal but an motor out job to fit it.
It has the same or very similar bellhousing bolt pattern as the smaller Chevy V6s, 2.8L.
A 700R4 out of a V6 3rd gen camaro would be what you want.
I got one here but need it as a parts donor. But you'd be welcome to have the case.
They are about 300bhp in the Cadillac STS, I've had a few and they go well, 7sec 0-60 and best part of 150mph, you hear of the suffering head problems but its usually down to people overheating them when they can't be arsed to fix the water pump as its a nightmare in the STS with the transverse engine
You see a lot of fifties Caddies with them fitted in the states, there's a few companies specialise in the adaptors, I think its a 700R4 out of a S10 they usually use
Few years ago I spent weeks fitting a Caddi-northstar V8 into a Ferrari-style rebodied Pontiac Fiero GT with great difficulty.Being FWD I assumed it would go in a rear engined car with little problem,which to a large extent was true as I had gone that route in the past with a Toronado V8 in an Opel GT. However getting the V8 in was the least of it, getting the unit to think straight was the nightmare. Everything was computer controlled with sensors and widgets ? even the transmission gear changes are ECU controlled which created all sorts of headbanging.My good buddy whose regular job was wiring space-shuttles at NASA spent 3 weeks sat cross legged on the floor of my workshop surrounded by miles of cable constructing a custom wiring loom to accommodate the marriage of a Caddi to a Fiero. Eventually it all worked in some fashion ,was shattering in performance but it was difficult to live with the fuel consumption of 7 MPG irrespective of any attempts to improve it
I am an old school engineer with a feeler gauge and big hammer, these young (moon-lighting) NASA electrical technicians are a new breed that come equipt with computers, mini- volt readers and speak a different tonque (variable ring-tone decibels) so I just left him too it , hoping that the machine would not explode and disintegrate.( major fail, It DID!!
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