My first 1377 on the way

[mudduck48]

Awesome info guys. Thanks!  Looks like I will be calling Crosman Monday!

If you call Crosman monday,  don't forget to get you 5 or 6 transfer port seals. If  you are going to mod. you'll need them.
number is 130-036

[iflyos]

Good point on the seals, thanks.  Are there any other spare parts I should have on hand? 

Today I am gonna do something for a bench rest, whether I fab one up, or I just raid the wife's fabric supply and sew up some rice bags. 

I also need to locate a steel breech, and spend some time learning more about pistons and valves.

[AgentWD40_FL]

Are there any other spare parts I should have on hand? 

Get yourself a few safety balls and springs

[WyoMan]

Good point on the seals, thanks.  Are there any other spare parts I should have on hand? 

Here's some helpful sources for the modder enthusiast:
machine screws, ball bearings, springs, drill bits, taps, extractors, etc:
http://www.mcmaster.com/#

Orings - the best prices, and selection I've found:
http://www.theoringstore.com/

This stuff is so much fun....

[Brent]

I just got done ordering/ receiving those exact same parts listed above. $10.84 for the stock, $8.75 for the fore arm, $1.74 per grip. It took about 2 1/2 weeks for it to ship.