OK lets say I have to replace my 350 TBI.. do I rebuild this one or do I buy a 383 crate motor??

If I buy a 383 can I buy it with just the heads and put my performer intake, cam & timing chain on it??

it's just the crank that is different from the 350 right?? I could still use all my stock sensors with my TBI??

Or am I better to just buy a 350 crate motor??

any advice would be appreaciated..

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'88 C1500 350 TBI
Belltech 2/4 Drop,
Nitro Drop Shocks,
3.73 Rear gear ratio,
Edelbrock performer TBI intake, performer cam, timing chain,
Hiflow cat with Rhino dual 2 1/2" out the rear.