Cruise control question 98 GMC

[BikeRider50]

Got a strange cruise control question.

98 GMC Sierra 4x4
had 5.7, but replaced it with a HT383 stroker from GMPP
Prior to replacement, cruise worked fine.
Post engine swap, cruise takes 2-5 minutes to engage, and does not hold
speed on grades. Very erratic operation.
No other known issues, engine runs fine. Cruise cabling seems fine.

Ideas where to start?

[JR]

"BikeRider50" <BikeRider50@takethisout**********> wrote in message
news:Q7sPl.61789$iW4.26388@en-nntp-01.dc1.easynews.com...
> Got a strange cruise control question.
>
> 98 GMC Sierra 4x4
> had 5.7, but replaced it with a HT383 stroker from GMPP
> Prior to replacement, cruise worked fine.
> Post engine swap, cruise takes 2-5 minutes to engage, and does not hold
> speed on grades. Very erratic operation.
> No other known issues, engine runs fine. Cruise cabling seems fine.
>
> Ideas where to start?

The key phrase is "Prior to replacement, cruise worked fine."
I would look for a vacuum leak.
Regards,
JR