It's been a while since I penned part one (detailing the differences between the Wild Willy M38 and Wild Willy 2 body and fittings), this time I'll be covering the differences in chassis parts on the earlier "Short" wheelbase (SWB) and the later "Long" wheelbase (LWB) versions.
"Short" and "Long" are actually something of a misnomer as the actual difference in wheelbase (the distance between wheel centres front to back) is only something like 10mm.
Wild Willy 2 vs Wild Willy M38s
The manuals deserve a mention too - the manual for the LWB chassis not only shows the revised parts but many of the illustrations have been done from different angles, and in places the assembly order changes. Having built both I don't think either one is easier than the other, the front end especially is fiddly in either incarnation & overall one set of difficulties replaces another.
The chassis is basically the same as the M38 LWB, but has some obvious differences: the front bumper (often missing) & bracket, splitter & bracket, rollbar, single wheelie bar/spring, wheels & tyres.
The motor pinion is larger to account for the smaller wheels, and the back plate of the primary gearbox has the idler gear shaft hole offset to accommodate it. It's also stamped "RCC Quattro", so it's rather obvious what came first in Tamiya's design thinking.
M38 SWB & LWB vs Wild Willy
With the exception of a few screw and bearing dimensions, the chassis of the "M38" and "2" generations of the Wild Willy have no parts in common.
Opel Ascona & Audi Quattro
I don't own either of these so no photographs, but fundamentally the chassis are the same as the Willy's Wheeler but with different tyres, and an extended chassis tub and mechanism box lid. Neither have a wheelie bar.
Written by TB member Jonny Retro