Just wondering if a caddy 500ci would fit into my 89 iroc.. And if not, what wouldn't fit? Would it be the hood giving me problems? I know I'd need a different tranny, but that's not too big of a concern to me.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else

 

btt

 

Oh god you know its getting close to summer when people start thinking of wackier things to do to their thirdgens. The caddy 500 is a big block, I believe, and a big block will fit between the fenders, but you better bust out the torch and prepare to cut. I saw an 82 Z at a swap meet with a 454 in it, and the inner fenderwells were removed, as well as lot of the firewall.

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1983 Firebird
TH700R4 Auto
Small Block 400
LG4 ECM, Intake, Carb, Distributor, etc.
Soon to be non-computer.
Clarion Head Unit 45X4
2 Pioneer 400W 12" Subs
Third Gen Performance
"A four cylinder is half an engine."

 

A caddy 500 is completely different from a big block chevy. You will need a different transmission, and probably different motor mounts at least, plus some "room making" in the engine bay.

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"American made baby. 100% American iron. The muscle among the masses. My hero. Yep, you can take your ergonomically designed, space age, computer controlled, 4 door, cup holding map lighted split double wishbone split fold down retractable cargo covered moon roof piece of transportation and keep it. For I have felt the thunder. And I know the difference!"
JSP Motorsports
ICON Motorsports

 

A buddy of mine has an 86 z28 with a 396 and he didnt have to do any cutting.No more a/c though.

 

Do it Do it do it....

Biggest problem seems like it Could be Getting HEaders.


May have to be a cutom Jobber.




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60 Ranchero - Project ( Money Hole )
85 Sport Coupe LG4 - Daily Driver
Reader's ride -> My Ride

Just another Hot Rod kid, or thats what they all tell me.
Livin' the Stereotype

 

YEAH big block chevy will fit no cutting required, it is a tight fit though. now a caddy 500? i think they are wider than a BBC aren't they? i don't know or sure. i do know that the inner fenders are part of the cars structure. if you cut them away the car will loose alot of chassis stability wont' it? a big fat 500 cad would be cool though. i saw a 455 buick in a 87 trans am once. maybe you could go that route.

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86 IROCZ
T-Tops
700R4
305 TPI
3.23 gears
shift kit, manual TC switch, manual fan switch, flowmaster exhaust with edelbrock TES headers& hollow cat, gutted MAF.

 

Well, It's a bigass engine.. 8 litres plus I think.. and I know thirdgens were never built for that. I know I'd have to get a different tranny but that wouldn't be a difficulty either. Headers, yeah, that would be an annoyance, but not much more than that really.

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89 iroc-z 305 tbi
k&n filtercharger, open element air filter. nuffin' else

 

Yea it can be made to fit im sure but 500s seem to be hard to come by. I know this guy that was looking for a caddy 500 for his 32 ford and he found one for like 2500$ and it needed a rebuild. A 454 would give you plenty of mustang thrashing fun and thrashing other 3rd gens as well as anything on the road.

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If you really want to be original slap in a TURBO DIESEL!

 

I have a 500 in my P/U. It's a great engine. I've also got a 396 in my 87 RS. I can offer you a little insight here as to what some of the issues are going to be.

1. Headers aren't a problem. You can buy ANY BBC header and just put cut off the BBC flange then weld on a caddy flange. (availible from MTS or The Cad Company) Sanderson makes blockhugger headers for the cad too.

2. The 8.2L cad is huge, and easy to find. I know of at least 4 right now. All for under $400. 2 even include the car. (one of those is $200)

3. If it won't fit it will be damn close. You could remove some of the inner well and just reinforce the area with some bracing. A custom STB would be mandatory. The BBC fits with NO mods to the chassis. Based on that, it is possible. Whether it's actually/realisticly do-able is another question. Get a tape measure and get the width/height/depth and then go check out your engine bay.

There are some issues with the cad you should consider. The valve train is very weak and wont hold up much past 5000 RPM. There are ways of taking it to 7000, but the kits are costly. The cad company can supply you with whatever you need, even 10:1 pistons. The only other thing I can think of right now is that the car will need a better rear suspension, the amount of power of the cad will never be put to the ground by the stock pieces.

P.S. If your planning to use a manual trans (there are adapters available) you will need to drill the crank to accept a standard GM pilot bushing