es compatible con silverado 97 vortec 8??

Yes, this is compatible. If you have any other questions, please let us know. Thank you, Ginger Babb Gauge Store 317-856-1810

Will this make an oem tachometer work in a 1990 pontiac firebird which has had a 2001 ls1 engine and pcm swap?

Nor sure , it probably would. I put a 283 with hei in a 2001 Chevy Silverado. The truck had a v6 in it . I set the dakota box on 8 cylinders in and 3 cylinders out and it put the tack on the money . Chevy sends half cylinder signal to the tach . May have to play with it to find your setting .

Will this work off of the stock flywheel sensor or do I need to buy the one sold separately ?

This Universal Speedometer and Tachometer should be able to read from the stock flywheel sensor, if you have more questions, please let us know. Thank you, Ginger Babb Gauge Store 317-856-1810

ASIN	B07YQ7P8SN
Best Sellers Rank	97,647 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 65 in Industrial Tachometers
Brand	Dakota Digital
Customer Reviews	5.0 5.0 out of 5 stars (1)
Date First Available	8 Nov. 2019
Item Weight	113 g
Item model number	SGI-100BT
Manufacturer	Dakota Digital
Manufacturer part number	SGI-100BT
Model	Dakota Digital
Product Dimensions	17.78 x 10.16 x 7.62 cm; 113.4 g

Restoration Performance Dakota Digital SGI-100BT Universal Speedometer and Tachometer Interface

Details

Description

Specifications

Common Questions