The aluminum block V8 was actually lighter than the boat anchor 4 that the B came with if I recall.

I was always talking about a turbo'd 4 in mine... but again the chassis is just terrible and the car is a terrible platform for performance.

The are fun little cars in low speed twisties, keep them in that environment is my opinion.

My brother has been building up a rubber-bumper 215 V8 MGB. The engine is all aluminum and is actually lighter than the cast iron 4 cylinder. I believe between the engine, and lighter T5 transmission and 8" Ford rear end, he was dropping about 50-100 pounds total weight.

Go with an engine other than the aluminum 215, and the weight goes up quite a bit. I think the HP and torque numbers were well above 200 units.

He's getting married soon, so I have no idea if the car will every be finished.

Guy around my way has a '70 MGBGT with a FD RX7 13B turbo in it. Man does thing haul a$$

I've toyed with the idea of the GT as I'm sure the rigidity solves many of the B's problems, but then again there are many many others it likely doesn't.

The Triumph GT6+ would probably be a better platform but then not by much.

Triumph you say?

On Craigslist in Phoenix: 1972 Triumph TR-6 V8 Convertible

<a href="http://s1207.photobucket.com/albums/bb469/acjlej11/1972%20Triumph%20TR6/?action=view&amp;current=P6131049.jpg" target="_blank"><img src="http://i1207.photobucket.com/albums/bb469/acjlej11/1972%20Triumph%20TR6/P6131049.jpg" border="0" alt="Photobucket"></a>

http://photobucket.com/1972triumph

As the past owner of an MGB, I know something about this.

The 4 banger that comes with a B weighs in plus or minus the same as a Ford small block V8. Memory says 420LBS but who knows. It has been a while.

The Buick V8 should not be a weight problem.

I have a buddy who converted a British MGB-V8 to left hand drive. It might still be in Oregon.

Another buddy has a cherry MGB-V8 that is stock. His may be the nicest in the US.

They are nice rides from what I hear.

Larry

Unsubstantiated opinions can be misleading.---Take notice of Embraer's post

All the info you will ever need on --http://www.britishv8.org

i've seen SR20 series engines in MGB's. a friend is building a rover v8 MGB. a toyota 1UZFE v8 could be a good candidate if it fits ok.
http://www.mgexperience.net/phorum/read.php?40,512049,page=1

https://www.google.co.nz/search?q=mgb+sr20det&hl=en&rlz=1C1CHOI_enNZ410NZ41 3&prmd=imvns&tbm=isch&tbo=u&source=univ&sa=X&ei=FH UcUM-uDc-fiQfivIG4CA&sqi=2&ved=0CE0QsAQ&biw=1600&bih=884