Here's a thread I did a while ago about swapping in a V8 in my 1960 GMC, most of which applies to the 60-62 Chevy as well:
http://67-72chevytrucks.com/vboard/showthread.php?t=369663If you're going to retain the stick shift the original style V8 engine and bellhousing mounts will work, but if you want an automatic side mounts are needed and a tail mount transmission crossmember. Factory automatic crossmembers are very rare, but do come up on eBay every now and then. Fabricating a new one should be relatively easy once you know how they were originally installed. The first link inside the thread shows the various engine mounting brackets that can be used. For throttle linkage the six cylinder firewall pivot works fine, but the arm for the V8 is either longer or shorter (I can't remember which).
Should power brakes be desirable while retaining the stick shift, there is now a high quality and well engineered bracket available:
http://www.67-72chevytrucks.com/vboard/showthread.php?t=362375I originally bought the Master Power Brake arrangement and found it deficient so I designed my own, long before the above bracket was on the market.
On a somewhat related subject, here's a thread about swapping in the later coil spring suspension in this series of truck should there be any interest:
http://67-72chevytrucks.com/vboard/showthread.php?t=366850
