302 is bigger then 129173302 − 129 = 173
52.381% difference.
155 is less than 390 and 390 is higher than 155.
Difference between IQ levels of 150 and 155 will be similar to differences between IQ levels of 95 and 100
The 302 boss has slightly bigger heads, it comes stock with 351 Cleveland heads.
49 cid
As long as the 302 is from a similar year it will bolt right in. The only difference between the 289 and 302 is the 302 has a slightly longer stroke.
49 ci more horse power.
The range is 55, which is the difference between the highest and lowest numbers.
155-36 = 119
The main difference between the Ford 289 and 302 engines lies in their displacement and design features. The 289 has a displacement of 289 cubic inches, while the 302 has a larger displacement of 302 cubic inches. Additionally, the 302 often features a different crankshaft and may have updated components leading to improved performance and power output. Both engines are part of Ford's small-block family but are tailored for different performance needs and eras.
It's electronically limited to 155 miles per hour