martinlx

Hi i jsut found a 307 out of a holden Brougham HK.

Is it worth buying and what potential does it have?

Im looking at puttting it into my 76 LX torana i will jstu be using it as a sunday cruiser and every so often drag car any thought would be great?

Cheers martin

mackeb

350 would be a better bet especially considering a new 350 is only $2800 short or around $4500 long.

Infact a 308 would be a better choice than a 307 especially in a torana and especially if you want to rego it. A 355 Holden V8 would be better again.

383 SBCs are also fairly cheap.

Leave the 307 alone, they are not generally used in hi-po motoring and really the only place for them is in a period resto of a car.

I personally woould be going for a stout 308.

skidmarx

same opinion, personaly i feel a 307 chev bang for buck wise isnt a good choice

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wabbit

i agree.

the bore/stroke combination of the 307 isn't the best. 3.75" bore/3.25" stroke
4 inches should really be considered the minimum starting point for bore sizing

it's hard to get the valves unshrouded with any less

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Move along, please

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martinlx

well there ya go haha ill look for a 350 then what do you sudjest long or short?
thanks for all the feedback

skidmarx

well, it would probly work out cheaper just buying a reco long motor... instead of buying short and searching around for some nice heads and shit

unless ofcourse u want to give it more poke and buy some nicer heads

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mrprem

If you can get the 307 cheap, buy it and sell it to someone who wants a genuine HK 307 for Monaro, Prem, Brougham... They're worth good money to the right person for a resto. Other than that they're not worth building for performance, not that they couldn't make decent power, they're just not economical price wise for a performance application. 350's are the cheapest S/B to build cos they're the most common displacement..