John,
The 89 has a 210 HP 5.7 with a throttle body and a 700R4. I have an 88 and it is no slouch. 93 up had a 4L60E which is basically the same trans with more computer controls. Of course the later engines had higher HP but for the price who could turn it down.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine