I think weight is a factor but not the overall key.
As said engines were more carefully overthought and not yust thrown together 2.3 ltr`s. The people back then looked more at the detail and the details are essential for an high hp engine.
Don`t go crazy with the weight Dirk, remember we drive street car`s leave this plasticnut and makrolon all around theme to the big boys which want to go into the 11s or faster.
For me a cal looker has to be in a way practicale, so good driveable and LOOK GOOD !
And yes the 195/50 tires will have an effect, the car will look like shit... I am with that point that you will get a bit better time but for that cost`s ?
For me the overall-look is more a factor then going a bit faster. First time on the track at DDD1 I even throw out the rearbench and the passenger seat.
But the car then looked not good to me, so next time on the track with everything = same time...
When you have a strong and good build engine, you will even go fast with all that stuff that`s makes a car run smooth and look good.
For me THE reference is Olaf from our club. (Of course there are many other examples but that`s my personal reference) His best time is a 14,540 at Bit and this with an 1776cc orig. gearbox no slicks and all that stuff. Imagine what a close ratio would have an effect in this car...
And this car is no trailer cat ! Olaf drives it to every event, makes boils in the pan and drives home. Everything without lighter batterys or no damping cause it saves 0,5kg but you must drive with mickey mouses.
Just a very good build engine which even has an impressive torque. With 4 people (and even those were not the lightest
it went up the hills as there were no tomorrow...
I find it kind of sad that cal-look is devoloping into the trailer-race section. For me a Cal-looker is a street car that goes severall times on the 1/4mile to have fun, but is not build for that. It`s a fast driven STREET car.
Just my thoughts...