V8 to Slant Six swap: Sacrilege to must, but what would need to be done to have it happen?

[Greg A-M]

I'm still keen on getting a manual, either 3 or 4 speed, for my duster but I'm pretty sure that buying another car of comparable condition that already has a manual in it is as cheap or cheaper than gathering all the parts needed to do the swap.

What happens if I find a v8 duster with a manual and I want to swap it for my six cylinder? What would I need to massage or swap to get it to fit. Everybody always talks about doing for 6 to 8 but I've not heard much about 8 to 6.

 

[halifaxhops]

If you have a car with a slant in it pretty easy I would think, K member, linkages rad, prob not real bad.

 

[Darter6]

The easiest is a K frame change and the proper engine mounts,you would be good to go. Lots of slant frames for the A's.Heck you could buy a complete donor car for the same as just buying a K frame.Sell off the extra parts and make money.
You are not the only one thinking of doing this.I want to do the same with a B body.Hope to find a 1970 slant K for a B. Also thinking of changing my 68 Valiant to a slant from a 273 (maybe)..

If you do find a V8 stick car you won't be able to use the fly wheel or the bell housing as they are different.

 

[halifaxhops]

Prob need a slant bellhousing flywheel etc also, not sure of that side.

 

[440DART1970]

When the weather breaks,March 2017 or so.. I'm doing 6cyl to 440 swap so I'll have what you may need... also spare 6cyl

 

[BillGrissom]

You should state the year when asking. Looks like a 73+ based on avatar.
You are probably correct that you are more likely to find a 4 spd manual in a V-8 car. If 3 spd and 4 spd bell-housings are the same (I don't know), then easy to find a 3 spd slant car. If not, the bellhousing may be a tough and expensive find. A Tremec 6 spd manual would be even cooler, but doubt anyone makes an adapter plate for a slant.

 

[CichliDart]

You should state the year when asking. Looks like a 73+ based on avatar.
You are probably correct that you are more likely to find a 4 spd manual in a V-8 car. If 3 spd and 4 spd bell-housings are the same (I don't know), then easy to find a 3 spd slant car. If not, the bellhousing may be a tough and expensive find. A Tremec 6 spd manual would be even cooler, but doubt anyone makes an adapter plate for a slant.

I recall reading a year ago or so that there was a group buy (no longer active) for an after market bell housing with a plate for late model transmission, perhaps it was the tremec.
The quick time below is for mopar 3 and 4 speed transmissions. I was looking at getting one for a while but my plans changed. It is designed to accommodate an 11 inch flywheel. I contacted Quicktime and McCloud about an 11 inch flywheel but they do not sell one. I think you can buy a Small block or Big block flywheel and have one hole drilled out for the off set bolt on the slant crank. (I would have it re balanced).
QuickTime RM-7072 Bellhousing – Mopar Slant Six - Holley Performance Products

 

[BillGrissom]

CichliDart's link to the Holley Quicktime answers some questions. That bell-housing attaches to either a 3 or 4-spd transmission, so the basic shape is similar. But, it has multiple mounting holes to allow that, so a 3-spd bell-housing won't bolt to a 4-spd without a lot of mod's that may not even be possible. Probably better to buy it, if worth $700 to get manual. I would hold out for a Tremec adapter since lighter aluminum. But I hate shifting. As is, I barely have 1 hand for steering while juggling drinks and food.