NOS HZ RTS chassis for sedan

[HK1837]

HZ chassis is thinner steel and aparantly better quality. HQ chassis is identical to HJ and also HX up until about 6/77. Late HX are the same as HZ.

If you put a HQ-6/77 HX side by side with a 6/77 onwards and look at the upper control arm mount and where the shock absorber sits you'll see the difference. Shocky doesn't move relative to the rest of the chassis but its position relative to the upper control arm does. Read up on suspension geometry and what moving the upper control arm backwards does and you'll get an idea.