Ha Yes the good old days, its not the size its how you use it, now where have we heard this before. <br />Yes you have to laugh, guys used to stick dominators on 308's to 350 chev's. The biggest problem I always found was that people always thought bigger was better, this is an example: I built two identical engines like mine, mine of course was in a hq monaro and my mates was in an A9X Torana. After proven tests at Castlereagh drags, a Holley 650 gave me faster times and top end speeds on my monaro than a 750 Holley, but on the Torana, it was the other way around, why?<br />The Torana is lighter, thus it doesn't bog the engine down as much with the larger carburettor on the lighter car. Now, we talk about cam shafts, people put the bigger the better. Crap! I tried about 4 different cam shafts from Wayne Jones in Parramatta and I definitely found that the bigger was not necessarily the better by doing the test as above. Now everyone used lightened fly wheels, pigs butt, I have forgotten but I had an engineering shop machine me one up around 25 pounds heavier than standard, thus my theory was, small engine, heavy car, 7500rpm, change gear, top loader having Liberty sliders in it for quick gear changes (every second dog was missing on the sliders) plus I ran special synchro's that crunched at slow speed or slow gear changes. So, what you have is 7500 revs, change gear, a massive amount of torque stored in the flywheel, passed through the unbreakable toploader gear box, passed through a specially designed tail shaft (you have to see the diameter of it and the universals) through the 12 bolt diff, which had a pair of second hand worn out Summers Brothers rear axles. So, in other words, all that power and torque went straight to the back tyres and it was hard to design traction bars to work on a hq rear end. No, we won't talk about different manifolds I tried, plus playing with alternator pullies as high revs killed the alternators, plus playing with the water pump as I found one hard drag, the temperature would rise, so someone pee'd in my ear and told me to cut out every second impellar of the water pump, thus stopping cavitation. I ran a modified L34 twin point twin mallory coil distributor system. All the other goodies, like Crane roller rockers, titanium retainers, triple valve springs, but still a flat tappett cam. As for pistons and rods, I used L34 rods and a set of Venolia 12 to 1 pistons with the fly cuts welded again, thanks to a very good friend of mine. Now here was a problem, whenever you mig weld pistons, the skirts pull in, so you have to weld them in a container of water with the head sticking out. Sent them to Wayne Jones Engineering to be machined correctly after welding, weighed and balanced them and even then took them to work at the Water Board and had the industrial chemist weigh them on their special weigh bridges that they use to measure parts per million of sh.it on a bit of paper so I weighed the 8 pistons, found the lightest and made the other 7 to suit. When you go into fine detail like this from radiator to diff, you will have a quick car. For years, people could not work out how I could run high 12's in the late 70's early 80's, They all thought I was cheating, but at National events, my car was continually weighed, they removed one spark plug, plugged this gadget in, cranked the engine and it measures the cylinder displacement multiplied by 8 cylinders and it always came out a little over 308 cubic inches. Its a pity I bought my second house and I ran out of money, thanks to my ex and that was pretty well the end of me spending big money on cars, but till today I still tell the young guys that I see here and there, yes it looks good to have twin Holley 600's on a tunnel ram, but it will never work.<br />Phil