Join Date: Sep 2000
Thanked 0 Times in 0 Posts
Re: 429 info
As you probably know the 429 and 460 are made from the same block, except for the BOSS 429, which was a quasi-hemi built to do battle with Mopar's hemi.
The 429s haven't been put into passenger vehicles in a long, long time. I'm pretty sure it was replaced with the 460 in the early to mid seventies. Any servicable 429 you find will require at least a freshening up, if not an entire rebuild at that age. So all things being equal, go for the extra cubic inch advantage of the 460.
Another consideration is that the earlier 429s were high compression and non hardened valve seats and therefore require new seats, valves and probably pistons, stick with the 460.