GT6

02RSX06,
I have seen a few Buick V6s, a Buick/Rover aluminum V8 and a few Chevy 350s in a GT6. In each case that I have seen the horsepower gain was negated by the greater weight on the front end drastically changing the handling characteristics. In almost every case the suspension had to modified greatly with added weight transfer to make the car handle correctly again. The GT6 engine is a well balanced engine( 2inch stroke and 2 inch bore) and with basic machining of "stock" components Bob Tullius and the group 44 guys managed to win the 1969 SCCA national championship and beat some much faster cars in a GT6. To a Triumph guy there is almost nothing better than watching a triumph beat up on a Porsche. With some of today,s modern metals, go fast goodies and some high tech ceramic and tephlon coatings you can get silly horsepower out of a GT6, add triple carbs, larger valves etc. and you can make even the most seasoned driver "pucker" in the seat of a GT6. Most racing organizations will not let you run with a "swapped" motor,,or if they do they will put you in the "X" class and you might be running with much, much faster cars, and this is not fun. The GT6 engine is already a pretty tight fit in what is essentialy a spitfire engine bay...change engines and you might have to modify the tunnel cover for a different gearbox, the hood and the attached inner wheel wells for clearance, suspension as mentioned before, radiator and possibly the fire wall. It ceases to be a GT6 at this point. I have a 70 GT6+ with a "hot" cylinder head, stage 3 cam, and a well balanced and lightened engine for a road car. With only these mild modifications it is hard to handle on the street as it is. Try tuning the engine you have before you fire up the blow torch.