# 91 305 engine ?

**URL:** <https://forums.speedlife.net/t/91-305-engine/189411>\
**Category:** PittSpeed Automotive\
**Created:** [April 20, 2007, 2:45pm UTC](https://forums.speedlife.net/t/91-305-engine/189411 "2007-04-20T14:45:13Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![tom\_vito](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/tom_vito/32/6000_2.png) [@tom\_vito](https://forums.speedlife.net/u/tom_vito)\
**Post date:** [April 20, 2007, 3:29pm UTC](https://forums.speedlife.net/t/91-305-engine/189411/8 "2007-04-20T15:29:08Z")

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> [@How would you go about diagnosing this problem...](https://forums.speedlife.net/t/how-would-you-go-about-diagnosing-this-problem/29575/22):
>
> LT1 was 93+ which was reverse cooled… i dont think there is any difference from 86 previous heads to the 87 up heads other than bolt hole angles and centerbolt valve covers

Looks like your getting a 305 with old heads…

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