for me the grey is a good option, it keeps the car traditional, to the way it was built + the car is dead stock, except for the rims
if i was after a drag car i wouldn't have brought a classic, and the only engine idd be putting in it's place would have 8 cylinders, but as the car is stock, it'll stay that way,
I'm just trying to source some box options to make fwy driving a bit easier, and handle some extra grunt,
another thing i look at is power to weight, with a grey the weight of the vehicle is kept low around 1150kg kerb 1060 tare
once you fit a v6 of v8 the weight go up about 250 kg with all bits and pieces you need to add.
vr v6 130kw@1400kg= 93kw per 1000k
vz v6 153kw@1400kg= 109kw per 1000kg
worked grey 130hp/100kw @1150= 87kw per 1000kg
stock vz 152kw@1590kg tare= 96kw per 1000kg
my stock grey 70hp/53kw@1060 tare= 50kw per 1000kg
yes there are more powerful v6 around (175/190kw) but they are also alot more expensive, and cost more to fit
thats still a mid 15sec pass, witch is no slug for a 50 year old car with a 50year old power-plant
to much theory not enough practicle there
i've had ALL sorts of options in early holdens for me grey's will do the job and are cool (BUT dear as poison to do anything to these days) a red is my prefered option (just about all of my driving is open road 100-110 +kmh
driving, 6 is only my prefered option due to ease of fitting and cost otherwise it would be V8, V6 maybe but they sound horrid
here's my practicle i think 130+HP from a grey would be hard to achieve in a streetable car, BUT you will get them to go reasonably well, i've had many hotty red 6's one day i bought a V6 manual VN wagon and in that VN (heavier than an early holden) it went like a scalded cat would have given alot of hot reds in early holdens a REAL good run for there money and left most watching the back of the wagon dissapearing all this with great fuel economy, i've had a few V8 earlies and well in a nutshell they were FANTASTIC
BUT these are just my views am in no way trying to persuade you not to use a grey, have you considered a 5 speed there's a fairly good how to on the FB/EK forum it's behind a grey and the guy seems wrapped in the conversion