hello to all just for the record you have all been so much help in the ..THANKYOU....ok for my question...my 95 has the 4.3 vortec..ok how hard wold it be to put the 5.7 vortec in it ..i dont want to get rid of the van so when the motor blows i want to know my options....i know physicaly it should fit no problem in thinking more so the wireing and what not...i would like to be able to pull more iwth the van ....any help would be great thankyou again to all

You need to head over to www.astrosafari.com and READ READ READ.

It can be done. Probably best to go with a standalone engine wiring harness if you are going to keep EFI.

But it can be done and fairly easily too.

And here's a shorter site listing things you can expect:

http://www.mentalsocket.com/astro/