MG Sports Cars

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

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barrysmgb
barry strugnell

(26 posts)

Registered:
12/24/2010 12:57PM

Main British Car:
cutting firewall
Posted by: barrysmgb
Date: December 25, 2010 07:24PM

hi i see some are cutting out large section of firewall by steering column. have a rubber bumper car can't i get motor in by just notching frt x member and installing new rear trans mount thanks barry


rficalora
Rob Ficalora
Willis, TX
(2764 posts)

Registered:
10/24/2007 02:46PM

Main British Car:
'76 MGB w/CB front, Sebring rear, early metal dash Ford 302

authors avatar
Re: cutting firewall
Posted by: rficalora
Date: December 25, 2010 08:00PM

Yes. Look at Graham Creswick's car; that's how he did his -- no cross member modification needed.


mgb260
Jim Nichols
Sequim,WA
(2465 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: cutting firewall
Posted by: mgb260
Date: December 25, 2010 08:24PM

Rob, Graham's how it was built thread say's he notched the crossmember 1 1/2". He did'nt say about the firewall but, no mods are needed for the 215 in the rubber bumper MGB. I think probably less for the Ford than in older ones. I cut mine back to the steering humps to heater shelf on my 73. Barry, I put more info on the Toyota brakes in the 5 lug hub thread.
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rficalora
Rob Ficalora
Willis, TX
(2764 posts)

Registered:
10/24/2007 02:46PM

Main British Car:
'76 MGB w/CB front, Sebring rear, early metal dash Ford 302

authors avatar
Re: cutting firewall
Posted by: rficalora
Date: December 25, 2010 09:36PM

I've talked with Graham and looked at his car. No firewall mosd. Set mine up the same way initially (also using a 302). Moved mine back modding the firewall to make room for Vintage Air's front runner serpentine belt system. But if you have a RB car you don't have to mod the firewall to fit a 302.


ex-tyke
Graham Creswick
Chatham, Ontario, Canada
(1165 posts)

Registered:
10/25/2007 11:17AM

Main British Car:
1976 MGB Ford 302

authors avatar
Re: cutting firewall
Posted by: ex-tyke
Date: December 26, 2010 09:38AM

Quote:
......you don't have to mod the firewall to fit a 302.

To set the record straight, there is no cut-and-weld firewall sheet metal rework required (unless there is a particular need to install the engine further rearward), however, there is likely some subtle hammer work required in the tunnel to accomodate for the bellhousing lugs/bosses.

A typical installation also requires the afforementioned 1-1/2" front xmbr mod.(photo below)

Typically, there is also frame cut-and-weld rework needed to accomodate the remote oil filter adapter

100_3929 (1152 x 864).jpg

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