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Old 01-19-2009, 07:15 AM   #1 (permalink)
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Engine Swap - Guidance from 200 ci to 302 V8

I've got a '66 coupe w/ 200ci-6. I am going to swap the 6 for a V-8.
I know it's been done a thousand times, but here are a few of my questions;

1) As far as the physical fit, are there any issues going to the 302 instead of the 289?
2) Considering motor mounts, are there any major modifications to the framework needed.?
3) Transmission - what is the recommended standard tranny for the 289 and 302?

RX
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Old 01-19-2009, 08:18 AM   #2 (permalink)
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Re: Engine Swap - Guidance from 200 ci to 302 V8

1. The 302 and 289 externally are the same dimensions so no problem.
2. No frame mods needed.
3. transmissions: C4 Auto, 4 speed toploader, AOD, T-5 are some of the common transmissions.

You should address steering & suspension and brakes when going I6 to V8. Do a search, there is plenty of information already posted on this.
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Old 01-20-2009, 09:15 PM   #3 (permalink)
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Re: Engine Swap - Guidance from 200 ci to 302 V8

I've done a swap on a '66 before. Pretty straight forward as far as the questions you've addressed. Latamud pretty much hit those on the head.

The suspension is where you really need to spend the money in the swap. I had a front 6-cylinder spindle break on me while driving. Not fun and it ended up costing more money in repairs because when the car slammed onto the pavement it bent the shock tower, lower & upper control arm.

The 64-66 years are the PITA IMO to do the swap because the I6 and V8 suspensions had EVERYTHING different. You'll pretty much need all the steering parts and a set of V8 spindles. You'll also want to pick up an 8" or 9" rear end.
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Old 01-20-2009, 09:35 PM   #4 (permalink)
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Re: Engine Swap - Guidance from 200 ci to 302 V8

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Originally Posted by wilit View Post
The suspension is where you really need to spend the money in the swap. I had a front 6-cylinder spindle break on me while driving. Not fun and it ended up costing more money in repairs because when the car slammed onto the pavement it bent the shock tower, lower & upper control arm.

The 64-66 years are the PITA IMO to do the swap because the I6 and V8 suspensions had EVERYTHING different. You'll pretty much need all the steering parts and a set of V8 spindles. You'll also want to pick up an 8" or 9" rear end.
Yeah the rear end is different and the I6 suspension is not as heavy duty, although I believe that spindle problem was probably provoked by lack of geased bearing sometime in that spindles life. My friend drove his I6 converted to v8 stang for a while before switching to the v8 parts, maybe at least a year before he got to the suspension/driveline
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Old 01-20-2009, 10:11 PM   #5 (permalink)
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Re: Engine Swap - Guidance from 200 ci to 302 V8

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Originally Posted by 66Racer View Post
Yeah the rear end is different and the I6 suspension is not as heavy duty, although I believe that spindle problem was probably provoked by lack of geased bearing sometime in that spindles life. My friend drove his I6 converted to v8 stang for a while before switching to the v8 parts, maybe at least a year before he got to the suspension/driveline
Unfortunately this all happened in the days before digital cameras so I don't have any pics, but I can assure you it didn't sheer off because of galling due to lack of lubrication. In fact, it sheered of behind the bearing, almost flush with brake backing plate. The car was running the I6 suspension for close to 3 years before the failure.
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Old 01-21-2009, 12:11 AM   #6 (permalink)
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Re: Engine Swap - Guidance from 200 ci to 302 V8

A couple minor points - be sure you get matching driveline parts to ease the pain. For example, the AOD requires the use of a 164 tooth flexplate (with the correct balance for the year engine), the correct starter, 11.5" converter, and different driveshaft yoke that uses a different U-joint than the I6 shaft - so you can't just use whatever's in the scrapyard or on Craigslist without being sure it's compatible with the rest of the components. Once you zero-in on what you want, folks here will help you verify what you'll need.

The blocks are similar enough to be interchangeable, however, the later 302/5.0 blocks do not have a boss for manual clutch linkage if you were going that route. The options are converting to hydraulic clutch or purchasing a block adapter to mount the linkage.

Someone is now making new spindles intended for I6 suspension that converts to 5-lug disc brakes but I don't remember who. Might be cheaper in the long run. Maybe a web search will get you some answers if someone else doesn't jump in with the info.

The swap is straightforward, but it's the 'little things' that will keep you busy...
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Old 01-22-2009, 12:53 PM   #7 (permalink)
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Talking Re: Engine Swap - Guidance from 200 ci to 302 V8

google granada front disc brake swap and get the step by step and list of all needed parts . very good write up .
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