[truckboy61]

Would it be difficult to place a 454 in a 66 ELCY that has a 327 ?

[techinspector1]

'66 Chevelles came from the factory with 396 BBC motors. All the stock parts to do your swap are on somebody's shelf, waiting for your phone call.

[fourspeedwagon]

Not at all. I just put a 454 in a 64. The frame horn (motor mounts) I didn't even have to change. Headers for the big block, block side motor mounts, and barely anything else. My radiator had the top inlet to one side so a water neck with an angle, mines a 4 speed, so I needed a slightly longer clutch pushrod. Easy as pie! DO IT!!!

64s didn't even come with big blocks from the factory- yours (66) was a regular option.
What transmission are you using?
If your radiator is only a 2 row I would upgrade that.

[truckboy61]

It has a t350 but I got a power glide in my garage I was thinking about putting in is the 350 better suited ?

[techinspector1]

Ummmm, no, a TH400 is better suited.

[327NUT]

A powerglide!!!! I've got an old Dynaflow you can have.

[skull]

if ya put in a big block the 10 bolt WILL NOT hold up

when ya floor it or launch hard, ya'll scatter that weak puppy all over the street. l been racing and street building 1966 chevys since 1978 and have wasted 10 bolts with built small-blocks. get a 12 bolt or a 9'' ford.

Later

[truckboy61]

Any suggestions regarding make and model to get rear end our of that will fit in smoothly ?

[skull]

Originally Posted by truckboy61

Any suggestions regarding make and model to get rear end our of that will fit in smoothly ?

depending on your'e budget, there is a couple company's that make 9'' ford
housings set up for the coil set-up. try criagslist or the internet for a 1964-1967 chevelle/ elcamino 12 bolt, those are direct bolt ins. 1968-1972 rear-ends are wider, but will work with the right offset wheels and narrower tires.

also any A-body GM product rearend will interchange. pontiac, buick, olds.

Later

[fourspeedwagon]

If you can or have someone help, an 8.8 rearend from an Explorer would work nice too. 96 and newer are disk brakes, most have 373 gears and limited slip- plus they're cheap and available. I wouldn't use one for a drag car, but it'll do better than the 10 bolt, especially if your just running street tires. And ditto what Tech Inspector and the Skull from the wrong side of the state said about transmissions.