Most wanted

iTrader: (1)

Well the motor is toased. I was thinking a 8.1 L but maybe a 6.0 L but i think it will look puney.

So far i thought a 8.1 with a th400. Simple, easy and effective.

patgizz

iTrader: (6)

theres an 8100 on ebay right now for ~$2400 BIN that i've come across every time i search for 6.0's

replacing a 472 with anything smaller would be uncivilized

Skele4door

iTrader: (1)

I bet that deville has a TON of space for forced induction plumbing. A 6.0L with flipped manis and properly sized turbo for whatever you plan to do with it would probably be a nice setup.

pist0lpete

iTrader: (3)

Keep in mind the aftermarket as far as modding an 8.1 is extremely limited from what I have seen and what parts they are come at a premium. If you don't plan on modding I would say its a good choice.

Stu Cool

iTrader: (13)

I love the gen III & IV motors, but Cadillac has an awesome motor in the old 500 Cu in that would be a direct bolt in for your car. The aftermarket is making some decent performance parts for the big Caddy too. Those motors have just a ton of torque which is what you need to move that big old boat. Surf on over to http://www.mtscadparts.com/ They have a forum with very helpful people. Just offering and old school alternative.

Pat

artmalibu

If you want a cad 500 PM me.

Most wanted

iTrader: (1)

Well I wanna do a fuel Injected motor. Not looking for performance, just turn the key and go. seems to be the best idea. I like the 6.0L with flipped manifolds, But its not practical for what this car is, and whose gonna be driving it.

Ill look up the 1 on ebay and see.

OKcruising

An 8.1L would be a good option in your case then. Performance is a bit pricey on them, but as long as you stay below 4K rpms, you'll be moving like a freight train.
Should mount right up with everything no hissy fits or anything.

Most wanted

iTrader: (1)

Now another question is will a 4l60 hold up behind this or do i need an 80???
Im thinking od would be nice.

OKcruising

You will need an 80... it's not an option really. There's no way possible a 60 could hold up to the torque an 8.1 belts out and the vehicle weight. Sure you could build a 60 to handle it but, I wouldn't trust it. It's a big block torquer, even at just a hair off 1600 rpm, your around 400ft. lbs, and it's a very very flat curve

You might be able to snag a 4L80/85 for around a thousand individually, or pulled completely from a truck with an 8.1 for under 5K, but dont take my word as gold, it's been a while since I've checked prices and I'm going on fuzzy math.

hannes_slanec

Are there 2 different bolt circles on the 496? They are also
available with the Allison Trannys and I wondering if there are to 8,1 blocks or if both trannys bolt on every 496?

Thanks

zigroid

iTrader: (22)

why not an LSx with a maggie?

Beaflag VonRathburg

iTrader: (176)

You can find 4l80e(s) on ebay for $100.