MG Sports Cars

engine swaps and other performance upgrades, plus "factory" and Costello V8s

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Cbarrie
colin barrie

(1 posts)

Registered:
11/24/2016 03:08PM

Main British Car:
A question for those who have done a V6 swap on a 74 Mgb convertible
Posted by: Cbarrie
Date: November 24, 2016 03:13PM

Hi, i have a 74 mgb convertible and am attempting to swap in a 3400sfi out of a impalla. With a nv1500 transmission from a s10.. I noticed things come up a bit short.. Is this swap possible without the T-5 Transmission from a camero or a firebird? There getting hard to find is why i ask.. And id prefer not to cut holes in my floor for the shifter. Any help at all would be appreciated... Thanks


BWA


(344 posts)

Registered:
04/13/2010 08:13PM

Main British Car:
Re: A question for those who have done a V6 swap on a 74 Mgb convertible
Posted by: BWA
Date: November 24, 2016 08:43PM

I put a 3400 from an Alero in my TR6.
I went the route of going with the following:
S10 bellhousing from a 92-93 4 cylinder s10
The same year and make s10 clutch diaphragm and clutch fork
A flywheel from a 98 Chev Cavalier.
A clutch plate and throwout bearing from a mid 90's 4 cylinder SVO mustang.
A modified Pontiac Fiero clutch slave
A Ford T5 transmission from an early 90's v8 Mustang (note the hole in the bellhousing has to be machined out so the T5 will slip in.
Going this route gives you a shifter location that is further back than the s10 transmission and the shifter is not tilted to the side.
I hope this helps you with giving you ideas of other options.

Cheers
Byron


BMC
Brian Mc Cullough
Forest Lake, Minnesota, USA
(383 posts)

Registered:
10/30/2007 02:27AM

Main British Car:
1980 MGB '95 3.4L 'L32' SFI V6, GM V6T5 & 3.42 Limi

authors avatar
Re: A question for those who have done a V6 swap on a 74 Mgb convertible
Posted by: BMC
Date: November 27, 2016 10:40PM

Colin,

I suspect that the NV1500 has the shifter in the same location as the T5 for all the S10 pickups which is 9" further Forward than the Camaro/Firebird.

If you were to make some sort of outside linkage, maybe it would be possible but the tunnel room above the gearbox is so tight, it's not going to be for the faint of heart.

What computer and wiring loom are you planning run?

-BMC.
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BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(6469 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: A question for those who have done a V6 swap on a 74 Mgb convertible
Posted by: BlownMGB-V8
Date: November 28, 2016 11:02AM

Also, every inch you lengthen the shifter is going to increase the throw so adding 9" will make a big difference even if it is a rearward extension. Most want to shorten the shifter.

Jim


Sidecardoug
Doug Rowe
Northern Nevada
(51 posts)

Registered:
07/04/2012 05:09PM

Main British Car:
1969 TR-6 Ford 302

Re: A question for those who have done a V6 swap on a 74 Mgb convertible
Posted by: Sidecardoug
Date: December 19, 2016 08:00PM

One option that may help those looking for a NEW 5 speed - McLeod ( the folks who make clutches & hydraulic throwout bearings ) now have a 5 speed, available through Summit Racing, that is close in size to the old Muncie 4 speed....!st gear 2.95 :1. 5th gear 0.63:1. Cost about $3000, including shifter.


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