Cadzilla's are ok within certain parameters.....

I've had several people ask me why more people don't build modern day "Studilacs" -a popular swap in the '50's was stuffing a Cadillac V8 into a Studebaker coupe.  I saw an article in "Street Rodder" where a guy had put a 472 Cad V8 / TH400 in a '61 Impala. It certainly made it a nice driver, and the 472 moved the big car quite briskly-quicker than the 283 or 348 V8s that were available stock. I knew a guy who put a 500 Cad into his '79 Chevy Pickup. It was a great tow rig.  Another acquaintence put a 472 Cad into an '81 Firebird. I know other guys that put them in '78-88 "G" bodies-Cutlass, Monte Carlo, Regal, etc. It's a cheap easy power infusion to be sure-anything 472 or 500 cubes is going to have massive low-end torque. The downside is, these engines are not high revvers-I mean their pretty much done by 4,500 rpm. Edelbrock makes a Performer manifold for them, but that's about it. There's not a lot of hot-rod parts for them. Depending on what body your running-a 455 Pontiac or Olds or Buick would be a much better choice, for two reasons.  The BOP 455's are reliable up to 5,800 rpm. And there are heads, cams, headers, intakes, crank kits etc available for these engines. It would be a lot cheaper and easier to build a 500 hp Pontiac or Olds than it would a Cadillac. Further-LS engines are getting cheap enough and plentiful enough in trucks and SUV's in junkyards that they may be a better way to go, and their's certainly a ton of aftermarket parts for LS motors. I'm not saying don't do the 500 Cad swap, I'm just saying understand it's limits, and realize that their may be cheaper, better performing stuff available.  Mastermind

Don't fall into the "Bigger is Better" trap....

In all the buff magazines all their project cars and and featured reader rides all have mega-buck, mega-cube stroker motors. 572 inch Chevy Rat Motors,514 inch Boss-Nine Fords, 528 inch Chrysler Hemis, and 505 inch ( 440 based ) wedge engines. There's crank kits to turn a 400 Pontiac into a 467, a 400 Mopar into a 451. There's 392 and 427 inch "Small-Block" Fords, 383, 427 and 454 inch "Small-Block Chevys. There are 410 inch ( 360 based ) "LA" Mopars.  All of these mega buck, mega horsepower crate engines are fine if you can afford one. But many of us can't shell out 15 grand just for the engine for a toy. Be honest-most musclecars are the fourth or fifth car in a household. You've got your daily driver, your wife has one, and if you've got teenage kids they have one. So putting 15 large for just one component into the 5th car usually isn't in the cards. But don't despair. Just run the engine that came in the car. And you can make some improvements. For example-if your car has a 350 Chevy in it, you couldn't ask for a better base for a hot rod. The small-block Chevy has been the test mule for new parts for like 60 years. If your rebuilding it, Eagle, Scat and other companies are selling crank and piston kits so cheap, that it won't cost any more to build a 383. The extra cubes will definitely give you a big boost in hp and torque whether you build it mild or wild. Ditto for a 302 Ford. Whether you have a '68 Cougar or a '91 Mustang, Eagle, Ford SVT and other companies sell rotating assemblies to turn a 302 into a 347 or a 363. And you can just "Run what you brung". A 396 Chevy can make serious power. You don't need a 454 or a 572. Experienced Chevy builders will tell you that all other things being equal-i.e.-heads, cam, etc-a 454 will make 20 hp more than a 427 and a 427 will make 20 hp more than a 396 / 402. Ok. Edelbrock claims 540 hp and 538 lbs of torque from their "Performer RPM" Package on a 454. Using this rule of thumb-a 396 would still have 500 hp. Magazine writers spout numbers flippantly, but 500 honest hp will make any car an absolute rocket. Depending on car weight, traction and gearing you'll easily run in the 12s, and maybe high 11s. That's serious power. The same goes for other "Mid-size" big blocks. Edelbrock claims 434 hp from their Performer RPM package on a 390 Ford. They claim 387 hp and 439 lbs of torque on a 400 Pontiac with 15 inches of vacuum at idle from the base Performer Package. That would really rip on the street-low 13s or high 12s depending on traction and gearing-with a glass-smooth idle. Edelbrock claims 422 hp and 441 lbs of torque on the Pontiac "RPM" Package on a 400. A 383 Mopar makes 417 hp with this package. See what I'm saying?  So if your Chevy has a 396 / 402, or your Pontiac has a 389 / 400 or your Ford a 390 or your Dodge a 383 / 400-use it. Don't search the galaxy and spend thousands more than you need to buying and building up a junk 454,455, 460 or 440.  If you need an engine for your Javelin / AMX but can't find a 390 / 401 AMC engine, don't despair. There's literally millions of 360 AMC engines in junkyards in Jeep Grand Wagoneers from the '80s and '90's. Edelbrock claims 433 hp for their Performer RPM package on a 360. A 403 Olds is a bolt-in replacement for a 330 / 350, and you know 50-70 more cubes is going to give a serious boost to hp and torque. You don't need a $15,000 500+ inch mega motor to have fun.         

Some engines are only useful as boat anchors.....

I get asked all the time by people for tips on hopping up or rebuilding some obsolete turd. It's odd, because these people seem obsessed with using something that no one else wants. For good reason. Here's my list, in no particular order. #1. 265 inch small-block Chevy. Unless your Concours restoring a '55-56 Chevy to the nth degree, these are doorstops. People loved 283s, because they could be bored to 301 inches. 327s are great if you have one.  Avoid the 307 used from '68-73. They have no power, and they don't rev high. And with 350s a dime a dozen why would you mess with a 307?  # 2. 300 / 327 / 340 Buick V8.  There is zero aftermarket support for these engines, and they don't make anywhere near the power and torque of the '68-77 350. # 3. 301 Pontiac. These share virtually nothing with the "traditional" 326-455 Pontiac V8 and there is zero aftermarket support.  # 4. 255 Ford V8. These early '80's "Economy" V8's share nothing with the traditional 260 / 289 / 302 small-block Ford. They have the triple axel of no power, crappy gas mileage and zero parts availability. # 5. 260 / 307 Olds V8. These are different from the 330-350-403 Olds small block. The motor mounts are in the same place which makes the 350 / 403 an easy swap. # 6. 360 Ford V8. A lot of '70's trucks had these turds. They have the double whammy of no power and crappy gas mileage. They are an FE engine, but they don't run near as well as a 390, or even a 352 in an old Galaxie.  # 7. 361 Chrysler. These are a "B" engine, but they don't run nearly as well as a 383 / 400. They don't run as well as the "LA" 360 small-blocks. Don't throw good money away on a turd. Mastermind