305 vortec to 350 crate motor swap exhaust question

[Schurkey]

While it's right there, and opened up, I'd junk the factory poppets right now!

FIFY.

 

[mrvsfriend]

The motor is ready to go in.

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[L31MaxExpress]

The motor is ready to go in.

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Looking good although you might want to examine your crank pulley bolts.

 

[b454rat]

I had a 96 Centurion that came with a 305. Had issues with the motor so bought a donor truck with a 350. When I pulled the motor it was a 350, pre-95 short block with vortec heads. The motor ran fine on the stock 305 tune and single exhaust. GM put single exhaust on 400s and prolly some big blocks, a 350 will be fine.